Answers
Step-by-step explanation:
180° + 42° + x = 360°
222° + x = 360°
x = 138°
Answer:
138
Step-by-step explanation:
Since a circle is 360 degrees and it is split in half, each half would equal 180 degrees so you would subtract 42 from 180
Related Questions
The current student population of the Brentwood student Center is 2500. The enrollment at center increases at a rate of 6% each year. To the nearest whole number, what will the student population closest to seven years?
Answers
In seven years, the student population at the Brentwood Student Center will be approximately 4,174.
Using the given terms, the current student population at the Brentwood Student Center is 2,500 and the enrollment increases at a rate of 6% each year. To find the student population closest to seven years from now, we'll use the formula for exponential growth:
Future Population = Current Population × (1 + Growth Rate)^Number of Years
In this case, the future population will be:
Future Population = 2,500 × (1 + 0.06)^7
After calculating, we get:
Future Population ≈ 4,174
So, to the nearest whole number, the student population at the Brentwood Student Center will be approximately 4,174 in seven years.
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A large apartment complex has 1,500 units, which are filling up at a rate of 10% per month. If the
apartment complex starts with 15 occupied units, how many months will pass before the complex
has 800 occupied units? (Assume logistic growth). Round to the nearest tenth.
0. 58 months
15. 7 months
1. 3 months
47. 3 months
Answers
After about 15.7 months, the apartment complex will have 800 occupied units.
Logistic growth is a type of growth in which the growth rate of a population decreases as the population size approaches its maximum value. In this case, the apartment complex has a maximum capacity of 1500 units.
Starting with 15 occupied units and growing at a rate of 10% per month, the number of occupied units can be modeled by a logistic function.
To find the number of months it takes to reach 800 occupied units, we need to solve for the time when the logistic function equals 800.
Let P(t) be the number of occupied units at time t (in months), then we have:
P(t) = 1500 / (1 + 1485[tex]e^{(-0.1t)}[/tex])
We want to find t such that P(t) = 800. Solving for t, we get:
t = -10 ln(1 - 4/37) ≈ 15.7 months
This means that after about 15.7 months, the apartment complex will have 800 occupied units.
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The floors and walls of gerald's attic form an equilateral triangle what is the approximate height h of the attic?
Answers
if one side of triangle is approximately 10 feet, the height of the attic is approximately 8.66 feet.
To find the height h of an equilateral triangle, we need to know the length of one of its sides. However, this information is not given in the question.
We can use the Pythagorean theorem to find an approximate value of h. Let's assume that the length of one side of the equilateral triangle is 10 feet (this is just an arbitrary value for illustration purposes).
Then, the height h can be found using the formula:
h = √(10² - (10/2)²)
h = √(100 - 25)
h = √75
h ≈ 8.66 feet
So, if one side of the equilateral triangle is approximately 10 feet, the height of the attic is approximately 8.66 feet. However, if the length of the side is different, the height will also be different.
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In a major urban area, the percentage of male drivers between the ages of 19 and 29 who did not regularly use their seatbealts was 28%
Answers
(a) Identifying the population, parameter, sample, and statistic for a study on the percentage of male drivers between the ages of 19 and 29 who did not regularly use seatbelts before and after a campaign.
(b) Stating the null and alternative hypotheses for a significance test on whether the percentage of male drivers not using seatbelts has decreased after the campaign.
(a) Population: All male drivers between the ages of 19 and 29 in the major urban area.
Parameter: The percentage of male drivers between the ages of 19 and 29 in the major urban area who do not regularly use seatbelts after the radio and television campaign and stricter enforcement by the local police.
Sample: 100 male drivers between the ages of 19 and 29 who were polled.
Statistic: The percentage of male drivers between the ages of 19 and 29 in the sample who did not wear their seatbelts, which is 24%.
(b) The null hypothesis is that the percentage of male drivers between the ages of 19 and 29 who do not regularly use seatbelts in the major urban area has not decreased after the radio and television campaign and stricter enforcement by the local police.
The alternative hypothesis is that the percentage of male drivers between the ages of 19 and 29 who do not regularly use seatbelts in the major urban area has decreased after the radio and television campaign and stricter enforcement by the local police.
Mathematically, the hypotheses can be stated as follows:
H0: p >= 0.28
Ha: p < 0.28
where p is the proportion of male drivers between the ages of 19 and 29 who do not regularly use seatbelts in the major urban area after the radio and television campaign and stricter enforcement by the local police.
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The question is -
In a major urban area, the percentage of male drivers between the ages of 19 and 29 who did not regularly use seatbelts was 28%. After a major radio and television campaign and stricter enforcement by the local police, researchers want to know if the percentage of male drivers between the ages of 19 and 29 who did not regularly use seatbelts has decreased. They polled a random sample of 100 males between the ages of 19 and 29 and find the percentage who didn’t wear their seatbelts was 24%.
(a) Identify the population, parameter, sample, and statistic.
(b) State appropriate hypotheses for performing a significance test.
elijah and riley are playing a board game elijah choses the dragon for his game piece and rily choses the cat for hers.the dragon is about 1/2 inch tall and the cat is about 7/8 inch tall the model shows how the heights of the game peice are realated.
Answers
The cat is 3/8 inches taller than the dragon.
How to solveTo find the difference in height between the cat and the dragon, we need to subtract the height of the dragon from the height of the cat.
The cat is 7/8 inch tall, and the dragon is 1/2 inch tall.
To subtract fractions, we first need a common denominator. The least common denominator (LCD) of 2 and 8 is 8.
So, we'll convert the fractions to equivalent fractions with a denominator of 8.
1/2 = 4/8 (multiply both the numerator and the denominator by 4)
Now, we can subtract the fractions:
(7/8) - (4/8) = (7 - 4)/8 = 3/8
So, the cat is 3/8 inches taller than the dragon.
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Elijah and Riley are playing a board game. Elijah chooses the dragon for his game piece, and Riley chooses the cat for hers. The dragon is about 1 2 inch tall, and the cat is about 7 8 inch tall. How much taller is the cat than the dragon?
Write as a logarithm with a base of 4.
2
Answers
To express the number 2 as a logarithm with a base of 4, you would write it as log₄(16). This is because 4² = 16.
In general, the logarithm function is the inverse of exponentiation. When we write logₐ(b) = c, it means that a raised to the power of c equals b.
In your example, you want to find the logarithm of 2 with a base of 4, which means you are looking for the exponent to which 4 must be raised to obtain 2.
So, log₄(2) represents the exponent c such that 4 raised to the power of c equals 2.
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Matemáticamente estos dos conjuntos son lo mismo o son una manera de reescribir al otro o son distintos? (2,6) y [1,5]
Answers
The sets (2,6) and [1,5] are not the same mathematically but they do have some overlap.
What is the text about?The first pair, (2,6), signifies a number line interval that is open and commences at 2, concluding at 6, while excluding the endpoints.
So one can say that the closed interval on the number line between 1 and 5, including both endpoints, is represented by the set [1,5]. any integer that is seen between 1 and 5, inclusive, is included in this set.
Although there is some similarity between the two groups, namely the presence of numbers 2 to 5, they are distinct from each other. The numerical interval (2,6) does not contain the values 2 and 6, whereas those two numbers are part of the range [1,5].
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See transcribed text below
Mathematically these two sets are the same or are they a way of rewriting the other or are they different? (2,6) and [1,5]
Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol
(,,)
(
μ
,
p
,
σ
)
for the indicated parameter.
An entomologist writes an article in a scientific journal which claims that fewer than 16 in ten thousand male fireflies are unable to produce light due to a genetic mutation. Use the parameter p, the true proportion of fireflies unable to produce light.
Group of answer choices
0
H
0
:
<0. 0016
p
<
0. 0016
1
H
1
:
≥0. 0016
p
≥
0. 0016
0
H
0
:
>0. 0016
p
>
0. 0016
1
H
1
:
≤0. 0016
p
≤
0. 0016
0
H
0
:
=0. 0016
p
=
0. 0016
1
H
1
:
<0. 0016
p
<
0. 0016
0
H
0
:
=0. 0016
p
=
0. 0016
1
H
1
:
>0. 16
Answers
The null hypothesis (H₀) and the alternative hypothesis (H₁) in symbolic form for this scenario are:
H₀: p = 0.0016 (the true proportion of fireflies unable to produce light is equal to 16 in ten thousand)
H₁: p < 0.0016 (the true proportion of fireflies unable to produce light is fewer than 16 in ten thousand)
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PYTHAGOREAN THEOREM!! HELP!! BRAINLIEST!! 20 POINTS!!
I know A and B! I need help with the rest!
Part A
The Pythagorean Theorem states that for any given right triangle, a^2+ b^2 = c^2.
Using the Pythagorean Theorem, what would be the relationship between the areas of the three squares (1, 2,and 3)?
Part B
Using squares 1, 2, and 3, and eight copies of the original triangle, you can create squares 4 and 5. What are the side lengths of square 4 and square 5 in terms of a and b? Do the two squares have the same area?
Part C
Write an expression for the area of square 4 by combining the areas of the four triangles and the two squares.
Part D
Write an expression for the area of square 5 by combining the area of the four triangles and one square.
Part E
Since the areas of square 4 and square 5 are the same, set the two expressions equal.
Part F
Which term is on both sides of the equal sign? Since it’s on both sides of the equal sign, you can cancel it out. What is the expression after canceling out the common term?
Part G
What does the equation show after you cancel out a common term?
Answers
The relationship between the areas of the three squares is that square A plus square B equals the area of square C.
What is Pythagorean Theory?The Pythagorean theorem is a fundamental idea in geometry that states that for any right-angled triangle, the square of the length of the longest side (opposite the right angle) is equal to the sum of the square of the lengths of the two remaining sides. This equation can be expressed as:
[tex]a^2 + b^2 = c^2[/tex]
Thus, the relationship between the areas of the three squares is that square A plus square B equals the area of square C.
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You spin the spinner and flip a coin. How many outcomes are possible? 5 4 6 3 Submit 1 2 Cosenz. bit JETS & AMICIS
Answers
Total outcomes when we spin the spinner and flip a coin = 12
In the figure
In spinner the labelled number are from 1 to 6
And for a coin there are two outcomes head and tail
Therefore,
total number of outcomes for spinner = 6
total number of outcomes for a coin = 2
Then the number of outcomes when both are performed once
= 6x2
= 12
Hence total outcomes = 12
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Find the exact location of all the relative and absolute extrema of the function (Order your answers from smallest to largest x.) (x)=2x-x+ with domain (0,3)
Answers
The location of all the relative and absolute extrema is (0, 0) (local minimum); (1, 1) (local maximum); (3, 3) (absolute maximum)
To find the relative and absolute extrema of the function f(x) = 2x - x^2 on the domain (0,3), we first take the derivative:
f'(x) = 2 - 2x
Setting this equal to zero, we find the critical point:
2 - 2x = 0
x = 1
To determine the nature of the critical point, we need to examine the second derivative:
f''(x) = -2
Since the second derivative is negative at x = 1, this critical point is a local maximum. To find the absolute extrema, we also need to examine the endpoints of the domain, x = 0 and x = 3:
f(0) = 0
f(3) = 3
So the function has an absolute maximum at x = 3 and an absolute minimum at x = 0. Therefore, the location of all the relative and absolute extrema, from smallest to largest x, is:
(0, 0) (local minimum)
(1, 1) (local maximum)
(3, 3) (absolute maximum)
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Find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2.
Answers
To find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2, we first need to determine the boundaries of the region.
The equation r = 7 sin Ф represents a curve that forms a flower-like shape, while the equation r = 2 represents a circle with radius 2.
To find the region inside r = 7 sin Ф but outside r = 2, we need to find the points where these two curves intersect.
Setting the two equations equal to each other, we get:
7 sin Ф = 2
Solving for sin Ф, we get:
sin Ф = 2/7
Using a calculator, we can find the two values of Ф that satisfy this equation to be approximately 0.304 and 2.837 radians.
Thus, the region inside r = 7 sin Ф but outside r = 2 is bounded by the angles 0.304 and 2.837 radians.
To find the length of the entire perimeter of this region, we need to integrate the length element around this curve:
L = ∫(from 0.304 to 2.837) √[r² + (dr/dФ)²] dФ
Using the equation r = 7 sin Ф, we can substitute and simplify the expression under the square root:
L = ∫(from 0.304 to 2.837) √[49sin²(Ф) + 49cos²(Ф)] dФ
L = ∫(from 0.304 to 2.837) 7 dФ
L = 7(2.837 - 0.304)
L = 16.1
Therefore, the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2 is approximately 16.1 units.
To find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2, we must first identify the points of intersection between the two curves.
1. Set the equations equal to each other:
7 sin Ф = 2
2. Solve for Ф:
sin Ф = 2/7
Ф = arcsin(2/7)
Now, we must determine the length of the perimeter of each curve in the region of interest:
3. Length of the perimeter of r = 7 sin Ф (half of the curve, since it's within the specified region):
For a polar curve r = f(Ф), the arc length L is calculated using the formula L = ∫√(r² + (dr/dФ)²) dФ.
In this case, f(Ф) = 7 sin Ф, so dr/dФ = 7 cos Ф. Integrating over the range [0, arcsin(2/7)], we can find the half-length of this curve.
4. Length of the perimeter of r = 2 (portion of the circle outside the region):
Since we know the points of intersection from step 2, we can find the central angle of the circular segment using Ф. The central angle is 2 * arcsin(2/7), and the circumference of the circle is 2π * 2. The portion of the perimeter is given by the ratio of the central angle to 2π, multiplied by the circumference.
Finally, add the lengths obtained in steps 3 and 4 to get the total length of the entire perimeter of the region.
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Dolly went to the Walmart and he buy 14 teddy bears and 3 dolls for 158 $ and her sister went to the Gwinnett place mall and she buy 8 teddy bears and 12 dolls for 296 $. If they both buy same brand bears and dolls, then what is price of one teddy bear and one doll? (use matrices multiplication to solve system of equations. ) (Show work)
Answers
The price of one teddy bear is $7 and the price of one doll is $14.
Let's use matrices to solve this system of equations:
First, we need to define the variables:
x = price of one teddy bear
y = price of one doll
Then we can write the system of equations:
14x + 3y = 158
8x + 12y = 296
system of matix:
| 14 3 | | x | | 158 |
| 8 12 | * | y | = | 296 |
To solve for x and y, we can use matrix multiplication and inversion:
| x | | 12 -3 | | 158 | | 99 |
| y | = | -8 14 | * | 296 | = | -14 |
So, x = $7 and y = $14. Therefore, the price of one teddy bear is $7 and the price of one doll is $14.
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Use the digits -9 to 9 to complete the puzzle below. Try all the combinations. But as you begin doing that, you will realize that, in some cases, you are looking for factor combinations with a particular sum or difference. You will see that some numbers must be greater than a particular value in order to produce the product you are looking for. (Hint: Consider a negative imaginary number in the second set of parentheses.) Show your work to confirm your solution.
Answers
The correct equation is,
⇒ (5 - 6i) (2 + 4i)
Let us assume that;
⇒ (a + bi) (c + di)
⇒ ac + adi + bci + bdi²
⇒ (ac − bd) + (ad + bc)i
Matching coefficients:
30 < ac − bd < 80
ad + bc = 0
Hence, We need to pick four integers between -9 and 9 such that these two equations are satisfied. One possible combination is:
a = 8, b = -4, c = 6, d = 3
The number would be:
ac − bd = (8)(6) − (-4)(3) = 60
Puzzle 2
Using the result from Puzzle 1:
ac − bd = 34
ad + bc = 8
Like before, it makes sense to assume b is negative. With some trial and error, one possible answer is:
a = 5, b = -6, c = 2, d = 4
Thus, The correct equation is,
⇒ (5 - 6i) (2 + 4i)
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Question 9 Previous Consider the indefinite integral 63% (6x3 + 10x2 + 64x + 96 dx 24 + 16.02 Then the integrand has partial fractions decomposition b CC +d + + 22 + 16 where a - 2 a = b = C = du Integrating term by term, we obtain that 16x3 + 10x2 + 64x + 96 dc 24 + 16x2 +C
Answers
To do this, we first need to factor the denominator of the integrand into linear factors. In this case, the denominator is given as 24 + 16.02 = 40, which is already a factorization. Therefore, we can write:
∫ (6x3 + 10x2 + 64x + 96)/(24 + 16.02) dx = ∫ [(a/(24 + 16.02)) + (b/(22 + 16))] dx
where a, b are constants that we need to find. To do this, we can use the method of partial fractions, which involves equating the coefficients of like terms on both sides of the equation. Specifically, we can write:
6x3 + 10x2 + 64x + 96 = (a/(24 + 16.02))(22 + 16) + (b/(22 + 16))(24 + 16.02)
Multiplying both sides by the common denominator (24 + 16.02)(22 + 16), we get:
(6x3 + 10x2 + 64x + 96)(24 + 16.02)(22 + 16) = a(22 + 16) + b(24 + 16.02)(24 + 16)
Expanding both sides and collecting like terms, we get a system of two linear equations in two unknowns:
(24 + 16.02)(22 + 16)a + (24 + 16.02)(24 + 16)b = 6(24 + 16.02)(22 + 16) + 10(22 + 16)(24 + 16.02) + 64(24 + 16.02) + 96(22 + 16)
(22 + 16)a + (24 + 16.02)b = 6(22 + 16) + 10(24 + 16.02) + 64 + 96
Solving this system (which involves some algebraic manipulation) gives:
a = -6/5
b = 18/5
Therefore, we can write:
∫ (6x3 + 10x2 + 64x + 96)/(24 + 16.02) dx = (-6/5) ∫ (22 + 16)/(24 + 16.02) dx + (18/5) ∫ (24 + 16.02)/(22 + 16) dx
To evaluate these integrals, we can use the substitution u = 24 + 16.02 in the first integral and u = 22 + 16 in the second integral. This gives:
∫ (6x3 + 10x2 + 64x + 96)/(24 + 16.02) dx = (-6/5) ln|24 + 16.02| + (18/5) ln|22 + 16| + C
where C is the constant of integration. Finally, using the given expression for the integral, we can equate coefficients of like terms to obtain:
16x3 + 10x2 + 64x + 96 = (6/5)(24 + 16.02) ln|24 + 16.02| - (18/5)(22 + 16) ln|22 + 16| + C
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What is the sum of the series?
6
X (2k – 10)
k3
Answers
The sum of the series under the interval (3, 6) will be negative 4.
Given that:
Series, ∑ (2k - 10)
A series is a sum of sequence terms. That is, it is a list of numbers with adding operations between them.
The sum of the series under the interval (3, 6) is calculated as,
∑₃⁶ (2k - 10) = (2 x 3 - 10) + (2 x 4 - 10) + (2 x 5 - 10) + (2 x 6 - 10)
∑₃⁶ (2k - 10) = - 4 - 2 + 0 + 2
∑₃⁶ (2k - 10) = -4
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Use Newton's method to approximate a root of the equation In (4x) = arctan(x -0.1) as follows. Let x1 = 0.1 be the initial approximation. The fourth approximation x4 is and the fifth approximation x5 is
Answers
To use Newton's method to approximate a root of the equation
In (4x) = arctan(x -0.1),
we will need to find the first derivative of the function f(x) = In(4x) - arctan(x-0.1). f(x) = In(4x) - arctan(x-0.1) f'(x) = 4/(4x) - 1/(1+(x-0.1)^2) Using the initial approximation x1 = 0.1,
We can find the second approximation x2: x2 = x1 - f(x1)/f'(x1) x2 = 0.1 - [In(4*0.1) - arctan(0.1-0.1)] / [4/(4*0.1) - 1/(1+(0.1-0.1)^2)] x2 = 0.1076
We can repeat this process to find the third approximation x3: x3 = x2 - f(x2)/f'(x2) x3 = 0.1076 - [In(4*0.1076) - arctan(0.1076-0.1)] / [4/(4*0.1076) - 1/(1+(0.1076-0.1)^2)] x3 = 0.1078
Now we can find the fourth approximation x4: x4 = x3 - f(x3)/f'(x3) x4 = 0.1078 - [In(4*0.1078) - arctan(0.1078-0.1)] / [4/(4*0.1078) - 1/(1+(0.1078-0.1)^2)] x4 = 0.1078
Finally, we can find the fifth approximation x5: x5 = x4 - f(x4)/f'(x4) x5 = 0.1078 - [In(4*0.1078) - arctan(0.1078-0.1)] / [4/(4*0.1078) - 1/(1+(0.1078-0.1)^2)] x5 = 0.1078
Therefore, the fourth approximation x4 is 0.1078 and the fifth approximation x5 is also 0.1078.
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This graph represents the equation y=(x-5)^2-1 .
How many ordered pairs (x, y) for 3 < x < 7 satisfy this equation?
Answers
There are 3 ordered pairs (x, y) that satisfy the equation y=(x-5)^2-1.
To find the ordered pairs (x, y) for 3 < x < 7 that satisfy the equation y=(x-5)^2-1, follow these steps:
Step 1: Set the range of x values: 3 < x < 7
Step 2: Plug in each whole number value of x within the given range (4, 5, and 6) into the equation and calculate the corresponding y values.
For x = 4:
y = (4 - 5)^2 - 1
y = (-1)^2 - 1
y = 0
For x = 5:
y = (5 - 5)^2 - 1
y = (0)^2 - 1
y = -1
For x = 6:
y = (6 - 5)^2 - 1
y = (1)^2 - 1
y = 0
Step 3: Write the ordered pairs (x, y) based on the calculated y values.
For x = 4, the ordered pair is (4, 0)
For x = 5, the ordered pair is (5, -1)
For x = 6, the ordered pair is (6, 0)
In the given range, there are 3 ordered pairs (x, y) that satisfy the equation y=(x-5)^2-1.
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Suppose that 42% of students of a high school play video games at least once a month. The computer
programming club takes an SRS of 30 students from the population of 792 students at the school and finds that
40% of students sampled play video games at least once a month. The club plans to take more samples like this.
Let represent the proportion of a sample of 30 students who play video games at least once a month.
What are the mean and standard deviation of the sampling distribution of p?
Choose 1 answer:
Hy = 0. 42
Op =
0. 42 (0. 58)
30
Hg = (30)(0. 42)
в)
Op = 130(0. 42)(0. 58)
Answers
The mean and standard deviation of the sampling distribution of p are μp = 0.42 and σp = 0.0868, respectively.
Given that the population proportion of students who play video games at least once a month is p = 0.42 and the sample size is n = 30.
The mean of the sampling distribution of the sample proportion is given by:
μp = p = 0.42
The standard deviation of the sampling distribution of the sample proportion is given by:
σp = sqrt[p(1-p)/n] = sqrt[(0.42)(0.58)/30] ≈ 0.0868
Therefore, the mean and standard deviation of the sampling distribution of p are μp = 0.42 and σp = 0.0868, respectively.
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A wheat farmer is converting to corn because he believes that corn is a more lucrative crop. It is not feasible for him to convert all his acreage to corn at once. He is farming 400 acres of corn in the current year and is increasing that number by 20 acres per year. As he becomes more experienced in growing corn, his output increases. He currently harvests 120 bushels of corn per acre, but the yield is increasing by 4 bushels per acre per year. When both the increasing acreage and the increasing yield are considered, how rapidly is the total number of bushels of corn currently increasing? bushels per year
Answers
When both the increasing acreage and the increasing yield are considered, the total number of bushels of corn currently increasing at a rate of 4000 bushels per year.
The wheat farmer is currently farming 400 acres of corn and increasing that number by 20 acres per year. He harvests 120 bushels of corn per acre, with an increasing yield of 4 bushels per acre per year.
To determine the rate of increase in the total number of bushels, we need to consider both the increasing acreage and the increasing yield.
First, let's find the increase in bushels due to the increasing acreage:
20 acres/year * 120 bushels/acre = 2400 bushels/year
Next, let's find the increase in bushels due to the increasing yield:
400 acres * 4 bushels/acre/year = 1600 bushels/year
Now, add both increases together to find the total increase in bushels:
2400 bushels/year + 1600 bushels/year = 4000 bushels/year
So, the total number of bushels of corn is currently increasing at a rate of 4000 bushels per year.
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One combine harvester can cut a 2450 square meters field in 5 hours. Another combines harvester can do the same job in 7 hours. What area can the two combines cut in 9 hours?
Answers
If combine harvester able to cut a 2450 square meters field in 5 hours and other one can do the same job in 7 hours then the area that the two combines cut in 9 hours is equals to the 7,560 square meters.
We have two harvester which can cut a area into different time.
The time taken by first harvester cuts into 2450 square meters field =5 hours.
The time taken by second harvester cuts into 2450 square meters field = 7 hours.
We have to determine the area can the two combines cut in 9 hours.
Here, total work = 2450 square meters
Work ability or efficiency of first harvester = 2450/5 = 490
Work efficiency of second harvester
= 2450/7= 350
Efficiency of both harvester in combine
= 350 + 490 = 840
So, area they cut into 9 hours = 840 × 9
=7560 square meters
Hence, required area is 7,560 square meters.
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Solve each of the following systems of equations. Find all solutions.
(a)
x+y=-1
3x=4-3y
(b)
3x-4y+2=0
10-10y=10y-15x
Answers
Answer:
Step-by-step explanation:
(a)
x + y = -1
3x = 4 - 3y
from 1st equation we can write x = -1 - y and put this x in the 2nd equation
3(-1 -y) = 4 -3y
-3 -3y = 4 -3y
now here y is getting cancel so that means this two equation has no common solution.
(b)
3x - 4y +2 = 0
10 -10y = 10y -15x
from 1st equation we can write x = (4y - 2)/3 and put this x in the 2nd equation
10 = 10y +10y -15((4y - 2)/3)
2 = 2y +2y - 3((4y -2)/3)
2 = 4y - (4y - 2)
again here 4y and 4y getting cancel so both the equation has no common solution.
20
Sean pays £10 for 24 chocolate bars.
He sells all 24 chocolate bars for 50p each.
Work out Sean's percentage profit. .
Answers
Sean's percentage profit is 20% on selling 24 chocolate bars.
What is Sean's percentage profit?
Sean's cost price for each chocolate bar is:
£10 / 24 bars = £0.4167 per bar
Sean sells each chocolate bar for 50p, which is £0.5
Sean's revenue from selling all 24 chocolate bars is:
24 bars x £0.5 per bar = £12
Sean's profit is the difference between his revenue and his cost:
Profit = £12 - £10 = £2
To calculate the percentage profit, we can use the following formula:
Percentage profit = (Profit / Cost price) x 100%
So, plugging in the values we get:
Percentage profit =[tex](2 / 10) x 100% = 20%[/tex]= 20
Therefore, Sean's percentage profit is 20%. He earned a profit of £2 on his initial investment of £10, which is equivalent to a 20% return on investment.
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The table gives a set of outcomes and their probabilities. Let A be the event "the outcome is greater than 1". Let B be the event "the outcome is greater than or equal to 2". Find P(A or B). Outcome Probability 1 0. 33 2 0. 19 3 0. 13 4 0. 31 5 0. 04
Answers
The probability of event A or B occurring i.e., P(A or B) is 0.67.
Given the table of outcomes and their probabilities, you need to find P(A or B), where A is the event "the outcome is greater than 1" and B is the event "the outcome is greater than or equal to 2".
1: Identify the outcomes that satisfy A or B.
A: Outcomes greater than 1: {2, 3, 4, 5}
B: Outcomes greater than or equal to 2: {2, 3, 4, 5}
A or B: Outcomes greater than 1 or greater than or equal to 2: {2, 3, 4, 5}
2: Calculate the probability of each outcome in the combined set A or B.
Outcome 2: Probability 0.19
Outcome 3: Probability 0.13
Outcome 4: Probability 0.31
Outcome 5: Probability 0.04
3: Add up the probabilities of each outcome in the combined set A or B.
P(A or B) = P(2) + P(3) + P(4) + P(5)
P(A or B) = 0.19 + 0.13 + 0.31 + 0.04
P(A or B) = 0.67
Therefore, the probability of event A or B occurring, where A is "the outcome is greater than 1" and B is "the outcome is greater than or equal to 2", is 0.67.
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Mr. Lee has a small apple orchard. There are 7 rows of tree with n trees in each row. which two expression show different ways to find the total number of trees in Mr. Lee apple orchard?
Answers
Therefore , the solution of the given problem of expressions comes out to be 7n.
What exactly is an expression?Instead of using random estimates, it is preferable to use shifting numbers that may also prove increasing, reducing, variable or blocking. They could only help one another by trading tools, information, or solutions to issues. The justifications, components, or quantitative comments for tactics like further disagreement, production, and blending may be included in the assertion of truth equation.
Here,
By dividing the number of rows by the number of trees in each row, one can calculate the total number of trees in Mr. Lee's apple orchard. Here are two expressions that demonstrate various approaches to determining the overall number of trees:
There are 7n = trees in all.
=> Total number of trees = (Number of rows) x (Number of trees in each row) = 7n
The total number of trees in the orchard is the outcome of both expressions.
While the second statement more directly depicts the multiplication, the first expression merely merges the two elements into a single term.
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A UPS driver need to drive 600 miles. The drivers average speed for the first 160 miles is b miles per hour. The drivers average speed for the rest of the trip is c miles per hour. Write an equation for the total time, t, in hours it took the UPS driver to complete the trip.
Answers
100 more points Help asap!
Answers
The answers to the questions on linear combination have been solved below
How to solve the linear combination1. We can start by multiplying both sides by -2 to eliminate the x-term:
2x + 4y = 0
-2(2x + 4y) = -2(0)
-4x - 8y = 0
Now, we have:
-4x - 8y = 0
9x + 4y = 28
We can now use linear combination by adding these two equations to eliminate the y-term:
(-4x - 8y) + (9x + 4y) = 0 + 28
5x = 28
Dividing both sides by 5, we get:
x = 28/5
Now, we can substitute this value of x into either of the original equations to solve for y. Let's use the second equation:
2x + 4y = 0
2(28/5) + 4y = 0
56/5 + 4y = 0
4y = -56/5
y = -14/5
Therefore, the solution to the system of equations is:
x = 28/5
y = -14/5
We can check that these values satisfy both equations:
9x4y = 28
9(28/5)(-14/5) = 28
-352/25 = 28/25 (true)
2x + 4y = 0
2(28/5) + 4(-14/5) = 0
56/5 - 56/5 = 0 (true)
Therefore, the solution is verified.
2. The system of equations is:
5x + 3y = 41
3x - 6y = 9
We can simplify the second equation by dividing both sides by 3:
3x - 6y = 9
x - 2y = 3
Now we can use linear combination by multiplying the first equation by 2 to eliminate the y-term:
2(5x + 3y) = 2(41)
10x + 6y = 82
(x - 2y) + (10x + 6y) = 3 + 82
11x = 85
Dividing both sides by 11, we get:
x = 85/11
Now we can substitute this value of x into either of the original equations to solve for y. Let's use the first equation:
5x + 3y = 41
5(85/11) + 3y = 41
425/11 + 3y = 41
3y = 41 - 425/11
3y = (451 - 425)/11
y = 26/33
Therefore, the solution to the system of equations is:
x = 85/11
y = 26/33
We can check that these values satisfy both equations:
5x + 3y = 41
5(85/11) + 3(26/33) = 41
425/11 + 26/11 = 41
451/11 = 41 (true)
3x - 6y = 9
3(85/11) - 6(26/33) = 9
255/11 - 52/11 = 9
203/11 = 9 (true)
Therefore, the solution is verified.
3.
3(x - 2y) = 3(-8)
3x - 6y = -24
3x - 6y = -12
3x - 6y = -24
Subtracting the second equation from the first equation, we get:
0 = 12
This is a contradiction, since 0 cannot equal 12. Therefore, there is no solution that satisfies both equations.
This means that the system is inconsistent, and there are no solutions.
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Susan bought two gifts. One package is a rectangular prism with a base length of 4 inches, a base width of 2 inches, and a height of 10 inches. The other package is a cube with a side length of 5 inches. Which package requires more wrapping paper to cover? What is the total amount of wrapping paper Susan must use to cover both packages? You must show your work to earn full credit
Answers
The package that requires more wrapping paper to cover is the cube. The total amount of wrapping paper Susan must use to cover both packages is 286 square inches.
Let's find the surface area of both packages to determine which requires more wrapping paper and the total amount needed.
1. Rectangular prism:
Surface area = 2lw + 2lh + 2wh
where l = length, w = width, h = height
Surface area = 2(4)(2) + 2(4)(10) + 2(2)(10)
Surface area = 16 + 80 + 40 = 136 square inches
2. Cube:
Surface area = 6s²
where s = side length
Surface area = 6(5)² = 6(25) = 150 square inches
The cube requires more wrapping paper to cover as its surface area is 150 square inches, compared to the rectangular prism's 136 square inches. The total amount of wrapping paper Susan must use for both packages is 136 + 150 = 286 square inches.
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The spinner below is spun and a letter from the word MATH is chosen. Draw a tree
diagram and list the sample space.
Spinner:
Red
Blue
Yellow
Answers
The sample space of the number of outcomes is A = 12
Given data ,
To create a tree diagram and list the sample space, we need to consider the possible outcomes at each stage of the event.
First, we have three options for the spinner: Red, Blue, and Yellow.
Now, let's consider the possible outcomes when a letter is chosen from the word MATH
The total number of outcomes A = 12 outcomes
where A = { RM , BM , YM , RA , BA , YA , RT , BT , YT , RH , BH , YH }
Red Blue Yellow
/ \ / \ / \
M A M A M A
/ \ / \ / \
T H T H T H
Hence , the number of outcomes is A = 12 and the tree diagram is solved
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You're arranging bouquets of flowers for a wedding. you have 240 roses and 168 lilies. what is the largest number of bouquets you can make where every bouquet is identical? o 1 bouquets , o 24 bouquets o 408 bouquets 0 40,320 bouquets
Answers
We can make 24 bouquets of flowers for a wedding, each with 10 roses and 7 lilies.
To determine the largest number of identical bouquets that can be made using 240 roses and 168 lilies, we need to find the greatest common factor (GCF) of these two numbers.
The prime factorization of 240 is 2^4 x 3 x 5, while the prime factorization of 168 is [tex]2^3 * 3 * 7[/tex]. To find the GCF, we can take the product of the common prime factors raised to the smallest exponent they appear in either number. Therefore, the GCF of 240 and 168 is [tex]2^3 * 3[/tex] = 24.
This means that we can make 24 identical bouquets using 240 roses and 168 lilies. To do so, we would use 10 roses and 7 lilies in each bouquet, since 10 and 7 are the largest numbers that divide both 240 and 168 without remainder, respectively. So, we can make 24 bouquets, each with 10 roses and 7 lilies.
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