Answer:
62
Step-by-step explanation:
x2 a 4 - 91
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Mrs. Beck buys 48 pieces of house siding. Each piece is 3.7 meters long.
Part A
Which equation represents the best estimate for the total length of siding Mrs. Beck buys?
The equation which represents the total length of the siding is given by A , where A = 50 x 4 = 200 meters
What do you mean by an Equation?Equations are statements in mathematics that have two algebraic expressions on either side of the equals (=) sign.
It displays the similarity of the connections between the phrases on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are examples of the parts of an equation. When creating an equation, the "=" symbol and terms on both sides are necessary.
Given data ,
Let the total length of the siding be represented as A
Now , the value of A is
Let the number of pieces be n = 48 pieces
Let the length of each piece be l = 3.7 meters
Now , total length of the siding A = number of pieces x length of each piece
On simplifying the equations , we get
The total length of siding A = 48 x 3.7 = 177.6 meters
Now , n ≈ 50 pieces
l ≈ 4 meters
So , total length of siding A = 50 x 4 = 200 meters
Hence , the equation is A = 50 x 4 = 200 meters
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If \( y \) varies directly as \( x \) and inversely as \( z \) and \( y=24 \) when \( x=120 \) and \( z=16 \), then what is the value of \( y \) when \( x=4 \) and \( z=15 \) ?
Y= 3.2
When \( y \) varies directly as \( x \) and inversely as \( z \), the equation is given by:
\( y = \frac{kx}{z} \)
Where \( k \) is a constant.
Substituting the given values of \( x \), \( y \) and \( z \), we get:
\( 24 = \frac{k(120)}{16} \)
Solving for \( k \):
\( k = \frac{24*16}{120} = 4.8 \)
Substituting the values of \( k \), \( x \) and \( z \) into the equation, we get:
\( y = \frac{(4.8)*4}{15} \)
Therefore, the value of \( y \) when \( x=4 \) and \( z=15 \) is \( 3.2 \).
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All students attending a homecoming assembly complete a digital survey as they arrive at their seats. The survey questioned them about what they were most looking forward to for the homecoming events. Assume all students in attendance participated and remained at the assembly for its entirety. Write probabilities as decimals rounded to hundredths Freshmen Sophomores Junfors Seniors Total 200 125 St Football Game Dance Total 98 198 500 498 512 Teachers take turns randomly choosing students to participate in the pep assembly games. Students can get selected for multiele suntes a) What is the probability a teacher chooses a sophomore and then another sophomore for the first assembly game? Round to two decimal places
Answer: The probability of choosing a sophomore on the first draw is 125/512. Since the selection is random and without replacement, the probability of choosing another sophomore on the second draw is 124/511. Therefore, the probability of choosing two sophomores in a row is:
(125/512) x (124/511) = 0.0603 or approximately 0.06 (rounded to two decimal places).
Step-by-step explanation:
Kehlani is trying to find the height of a radio antenna on the roof of a local building. She stands at a horizontal distance of 24 meters from the building. The angle of elevation from her eyes to the roof ((point AA)) is 20^{\circ} ∘ , and the angle of elevation from her eyes to the top of the antenna ((point BB)) is 41^{\circ} ∘ . If her eyes are 1.51 meters from the ground, find the height of the antenna ((the distance from point AA to point BB)). Round your answer to the nearest tenth of a meter if necessary.
The antenna's height is 12.1 meters, as stated throughout the announcement.
What does building type mean?Building type refers to a grouping of buildings according to their purpose, location, and style that serves as the standard for evaluating and categorizing variants. Buildings must be categorized as either support, civic, commercial, industrial, or residential. Any kind of fella construction is a structural. It could be anything: a dam or a bridge, for instance. In contrast, a building is a closed construction with walls and a roof. Once more, the more precise phrase is "building," although "structure" is far more generic.
Based on the graph.
[tex]$$\begin{aligned}& \overline{O H}=\overline{C D}=1.51 \mathrm{~mm} . \\& \overline{O C}=24 \mathrm{~m} . \\& \angle O C A=20^{\circ} . \quad \angle O C B=41^{\circ} .\end{aligned}$$[/tex]
In RT [tex]$\triangle A O C_,$[/tex]
[tex]$$\begin{aligned}& \tan 20^{\circ}=\frac{A_0}{O C}=\frac{A_0}{24} \\& \text { So } A_0=\tan 20^{\circ} \times 24=8.74 \mathrm{~m}\end{aligned}$$[/tex]
In Rt ΔOBC.
[tex]$$\begin{aligned}\tan 41^{\circ} & =\frac{O B}{O C}=\frac{O B}{24} \\O B & =\tan 41^{\circ} \times 24=20.86 \mathrm{~m} .\end{aligned}$$[/tex]
[tex]A B=O B-O A=20.86-8.74=12.12 \mathrm{~m} \approx 12.1 \mathrm{~m} .[/tex]
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Answer:
12.1
Step-by-step explanation:
I got the question right
Write the following radical expressions in simplest form: a)−72x4y122x8y2(
b)7z21128x14t8y6
The simplified form of the radical expressions are:
a) −12x2y6
b) 284x7t4y3
To simplify the following radical expressions, we need to factor the radicand and then use the properties of radicals to simplify.
For a) −72x4y122x8y2, we can factor the radicand as follows:
−72x4y12 = −(2*2*2*3*3)x4y12 = −(2*2*2*3*3)(x4)(y12)
Now we can use the properties of radicals to simplify:
√−(2*2*2*3*3)(x4)(y12) = √−(2*2)(2*2)(3*3)(x4)(y12) = −(2*2*3)(x2)(y6) = −12x2y6
For b) 7z21128x14t8y6, we can factor the radicand as follows:
1128x14t8y6 = (2*2*2*2*71)(x14)(t8)(y6)
Now we can use the properties of radicals to simplify:
√(2*2*2*2*71)(x14)(t8)(y6) = √(2*2)(2*2)(71)(x14)(t8)(y6) = (2*2*71)(x7)(t4)(y3) = 284x7t4y3
So the simplified form of the radical expressions are:
a) −12x2y6
b) 284x7t4y3
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REVIEW
At a grocery store, Ethan buys 4 bananas and 5 oranges for $5.60. The total cost of one banana and one orange is $1.20.
How much does each orange cost?
Answer:
The answer to your problem is, $0.60
Step-by-step explanation:
1 banana and 1 orange = 1.20.
We divide next:
1.20 / 2 = 0.60.
We know that because in the question it says one banana and one orange is 1.20. Next we divide because two items are sharing the same number.
1.20 / 2 = ? ( ? = 0.60 or 0.6 )
Thus the answer to our problem is, $0.60
Please answer number 15 and 16 show work
Algebra 2
The exponential function that models the percentage as a function of P is given as follows:
P(t) = 100(0.705)^t.
How to define the exponential function?The standard definition of an exponential function is given as follows:
y = a(b)^x.
In which:
a is the value of y when x = 0.b is the rate of change.The parameters for this problem are given as follows:
a = 100, as when x = 0, y = 100, from the second row of the table.b = 70.5/100 = 0.705, as when x increased by one, y was multiplied by 0.705.Hence the function that models the data in the table is defined as follows:
P(t) = 100(0.705)^t.
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Which is it????????////]//////.
The equation that represents the line of best fit for the scatterplot is given as follows:
B. y = -10x + 100.
How to define the linear function?The slope-intercept definition of a linear function is given as follows:
y = mx + b.
In which:
m is the slope, representing the rate of change.b is the intercept, representing the value of y when x = 0.From the graph, we have that:
The slope is negative, as when the input increases, the output decreases.The intercept is a value between 90 and 100, as there are two points on the graph when x = 0, (0, 90) and (0,100).Hence option B is correct.
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find the missing side of the triangle
The missing side of the triangle is 16 mm.
What is Trigonometry?Trigonometry is the branch of mathematics that deals with particular angles' functions and how to use those functions in calculations. There are six common uses for an angle in trigonometry.
As per the given diagram:
The sides and angles of the right-angled triangle is given:
To find v using the trigonometric ratio:
sinθ = (P/H) {P is perpendicular and H is hypotunese}
for θ = 30°
sin30° = (8/v)
1/2 = 8/v
v = 16 mm
Hence, the missing side of the triangle is 16 mm.
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MY LOAN INFORMATION ?
My Annual Borrowing $1,740
Federal Loans
Private Loans
$
$
Totals $
Annual
Borrowing
0
630
Total
Principal
$ 630
$ 0 2.8%
$630
Annual Federal Borrowing Limit
Annual Private Borrowing Limit
My Years of Borrowing
hp
Interest
Rate
6.5%
Loan
Term
10 years $
10 years $
$
$5,500
Limit Varies
1 Years
Payment
Amount
0 per month
5 per month
5 per month
Mar 1
12:27 US
Answer:
I'm sorry, but it is not clear what you are asking for. Can you please provide more information or a specific question?
How do you tell a rational number and an irrational number? whats the difference??
Answer:
Rational numbers are those that can be expressed as a ratio of two integers whereas irrational numbers are those which cannot be expressed as a ratio of two integers.
Rational numbers can be written in the form of a fraction whereas irrational numbers cannot be written in the form of fractions.
Rational numbers comprise of those perfect squares whereas irrational numbers comprise of surds.
Write an equation in slope-Intercept form for the line with slope -3 and y-Intercept 5. Then graph the line.
Answer: Y=-3X+5
Step-by-step explanation:
Slope intercept form is Y=mx+b where m is slope and b is slope intercept to graph you can use desmos which is a free graphing calculator just punch in the equation exactly as I gave it. since m is slope it is -3 and b is y intercept so 5 so Y=-3x+5
Answer:
y = -3x + 5
Step-by-step explanation:
y = mx + b The m is the slope and the b is the y intercept. Substitute in the slope and the y-intercept
y = -3x + 5
First, graph the y-intercept. That will be at the point (0, 5). From that point, go down 3 units and then go one unit right. You will be back on the line. That is the slope.
Helping in the name of Jesus.
A sprinkler can water between 1 and 150 square yards of a lawn. The length L in inches of rotating pipe needed to water A square wards is given by the function L = 111.25√A.
Graph the equation on your calculator.
How much area can be watered if the length of the pipe is 400, 700, or 1,100 inches long?
please help me!!
The area that can be watered if the length of the pipe is 400, 700, or 1,100 inches long are:
Where L = 400, A [tex]\approx[/tex] 12.82
Where L = 700 A [tex]\approx[/tex] 44.43
Where L = 1,100 A [tex]\approx[/tex] 86.13
The length of the pipe is given by the function:
L = 111.25√A.
Where a = (L/111.25)²
Thus, for L = 400inches
A = (400/111.24)²
(400/111.24)² = (400²)/(111.24)²
(400²)/(111.24)² = (160000)/(12369.5776)
Divide 160000 by 12369.5776 to get:
(160000)/(12369.5776) = 12.820128200735
Therefore, A = 12.820128200735,
A [tex]\approx[/tex] 12.82
Thus:
Where L = 700;
A = 44.434243
A [tex]\approx[/tex] 44.43
Where L = 1,100
A = 86.129479
A [tex]\approx[/tex] 86.13
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I need this by friday
The value of x for the given pentagon will be 125 degrees.
What is a polygon?In Mathematics, a polygon can be defined as a two-dimensional geometric figure that consists of straight line segments and a finite number of sides. Additionally, some examples of a polygon include the following:
• Triangle
• Quadrilateral
• Pentagon
• Hexagon
• Heptagon
• Octagon
• Nonagon
Given the values exterior angles of the pentagon such that, 70°, 60°, 65°, 40°, x°.
To calculate the value of x.
Since the Sum of all exterior angles of a pentagon is 360°,
Thus,
70 + 60 + 65 + 40 +x = 360
x + 235 = 360
x = 360 - 235
x = 125°
Therefore, the value of x for the given pentagon will be 125 degrees.
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Today, the sum of Caroline's age and Cameron's age is 73. 5 years ago Cameron was 2 times older than Caroline.
The answer of Caroline is 19.33 years old and Cameron is 53.67 years old
Let's start by assigning variables to represent Caroline's age and Cameron's age. We'll use C for Caroline's age and M for Cameron's age.
According to the problem, the sum of their ages today is 73, so we can write the equation:
C + M = 73
Five years ago, Cameron was 2 times older than Caroline. so we can write the equation:
M - 5 = 2(C - 5)
Now we can use the first equation to solve for one of the variables. Let's solve for C:
C = 73 - M
Next, we can substitute this value of C into the second equation:
M - 5 = 2(73 - M - 5)
Simplifying the equation gives us:
M - 5 = 146 - 2M - 10
3M = 161
M = 53.67
Now we can use this value of M to find C:
C = 73 - 53.67
C = 19.33
So Caroline is 19.33 years old and Cameron is 53.67 years old.
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x^2 - 5x + 5 = 0 select the two values of x that are roots of this equation
The two values of x that are roots of the given equation are approximately 3.618 and 1.382.
What is quadratic equation ?
Quadratic equations are used to model a wide range of phenomena in many areas of science and engineering, including physics, biology, economics, and finance. They are also used extensively in mathematics for their elegant properties and applications in algebra, geometry, and calculus.
We start with the quadratic equation:
[tex]$x^2 - 5x + 5 = 0$[/tex]
To find the roots of this equation, we use the quadratic formula:
[tex]$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$[/tex]
where [tex]$a$, $b$,[/tex] and [tex]$c$[/tex] are the coefficients of the quadratic equation.
In this case, we have [tex]a = 1$, $b = -5$, and $c = 5$.[/tex] Substituting these values into the quadratic formula, we get:
[tex]$x = \frac{5 \pm \sqrt{(-5)^2 - 4(1)(5)}}{2(1)}$[/tex]
Simplifying the expression under the square root, we get:
[tex]$x = \frac{5 \pm \sqrt{5}}{2}$[/tex]
Therefore, the two roots of the equation are:
[tex]$x = \frac{5 + \sqrt{5}}{2} \approx 3.618$[/tex]
[tex]$x = \frac{5 - \sqrt{5}}{2} \approx 1.382$[/tex]
Hence, the solutions to the equation [tex]$x^2 - 5x + 5 = 0$[/tex] are approximately 3.618 and 1.382.
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What is the perimeter of kite FGHJ? Round to 2 decimal places.
The perimeter of kite FGHJ is 39. Rounded to 2 decimal places, the answer is 39.00.
What is the perimeter?
The perimeter is the total distance around the boundary of a two-dimensional shape. It is calculated by adding up the lengths of all the sides of the shape.
First, we need to find the length of the other two sides of the kite:
Since FH = 17 and FT = 10, we can find the length of TH by subtracting: TH = FH - FT = 17 - 10 = 7.
Similarly, since GJ = 10 and TJ = 5, we can find the length of GT by subtracting: GT = GJ - TJ = 10 - 5 = 5.
Now we can find the perimeter of the kite by adding up the lengths of all four sides:
Perimeter = FH + TH + GJ + GT
Perimeter = 17 + 7 + 10 + 5
Perimeter = 39
Therefore, the perimeter of kite FGHJ is 39. Rounded to 2 decimal places, the answer is 39.00.
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Complete question:
What is the 'perimeter of kite FGHJ? Round to 2 decimal places?
Question 4: You are creating an obstacle for a community event. The area of the rectangular space is represented by the expression 8x² - 12x. The width of the rectangular space is represented by the expression 4x.
Part A: Write an expression to represent the length of the rectangular space. Show all work to find the length
Length of Rectangular Space
Part B: Prove your answer from Part A is correct by multiplying the length and width of the rectangle.
Write the expression in standard form:
Answer:
Part A: To find the expression for the length of the rectangular space, we can use the formula for the area of a rectangle, which is length multiplied by width. We have the expression for the area as 8x² - 12x, and the expression for the width as 4x. So, we can write:
Area = Length × Width
8x² - 12x = Length × 4x
Simplifying the right side by multiplying, we get:
8x² - 12x = 4x × Length
2x² - 3x = Length
Therefore, the expression for the length of the rectangular space is 2x² - 3x.
Part B: To prove that the expression for the length from Part A is correct, we can multiply it by the expression for the width and simplify:
Length × Width = (2x² - 3x) × (4x)
= 8x³ - 12x²
= 4x(2x² - 3x)
= 4x(2x(x - 3))
This is in fact the same as the expression for the area of the rectangular space, 8x² - 12x, in standard form.
According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.33°F and a standard deviation of 0.67°F. Using Chebyshev's theorem, what do we know about the percentage of healthy adults with body temperatures that are within 2 standard deviations of the mean? What are the minimum and maximum possible body temperatures that are within 2 standard deviations of the mean?
Question content area bottom
Part 1
At least enter your response here% of healthy adults have body temperatures within 2 standard deviations of 98.33°F
At least 75% of healthy adults have body temperatures within the range of 96.99°F to 99.67°F.
What is standard deviations?
The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.
Chebyshev's theorem states that for any distribution (not just the normal distribution), regardless of shape, at least 1 - 1/k^2 of the data values will be within k standard deviations of the mean, where k is any number greater than 1.
In this case, we want to know the percentage of healthy adults with body temperatures that are within 2 standard deviations of the mean. So we need to use Chebyshev's theorem with k = 2.
At least 1 - 1/2^2 = 1 - 1/4 = 0.75, or 75%, of the healthy adults have body temperatures within 2 standard deviations of the mean.
To find the minimum and maximum possible body temperatures that are within 2 standard deviations of the mean, we can use the formula:
Minimum = Mean - k * Standard deviation
Maximum = Mean + k * Standard deviation
Plugging in the values for this problem, we get:
Minimum = 98.33 - 2 * 0.67 = 96.99°F
Maximum = 98.33 + 2 * 0.67 = 99.67°F
Therefore, we can say that at least 75% of healthy adults have body temperatures within the range of 96.99°F to 99.67°F.
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Krystal throws a rappelling rope at a speed of 10 m/s down a 50 m cliff.
When will the rope hit the ground?
Use the drop-down to put the correct order to solve for when the rope will hit the ground.
With speed = 10 m/s, the rope will hit ground after 3.36 seconds.
What exactly is speed?Speed is a measure of how fast an object is moving, usually measured in units of distance per unit time, such as meters per second (m/s) or kilometers per hour (km/h). It is a scalar quantity, meaning it only has magnitude and no direction.
Mathematically, speed is defined as the distance an object travels per unit time. The formula for calculating speed is:
Speed = Distance / Time
where Distance is the distance traveled by the object, and Time is the time taken to cover that distance.
Now,
To find when the rope will hit the ground, we can use the kinematic equation:
y = vi * t + (1/2) * a * t²
where:
y = 50 m (the height of the cliff)
vi = 10 m/s (the initial velocity of the rope)
a = 9.8 m/s² (the acceleration due to gravity, acting downward)
t = time it takes for the rope to hit the ground
We can solve for t by setting y=50 and solving for t:
50 = 10t + (1/2) * 9.8 * t²
50 = t(10 + 4.9t)
t = 50/14.9=3.36 s
Therefore, the rope will hit the ground after 3.36 seconds.
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If f(v)=12v^(4)-40v^(3)+4v^(2)+17v+21, use synthetic division to find f(3) Submit
The value of f(3) using synthetic division is 72.
To find f(3) using synthetic division, we need to divide the polynomial f(v) by the factor (v - 3). This will give us the quotient and the remainder, which will help us find the value of f(3).
Write the coefficients of the polynomial in a row: 12 -40 4 17 21
Write the value of the factor we are dividing by to the left of the row: 3 | 12 -40 4 17 21
Bring down the first coefficient: 3 | 12 -40 4 17 21
------------------
12
Multiply the first coefficient by the factor and write the result under the second coefficient: 3 | 12 -40 4 17 21
------------------
12 36
Add the second coefficient and the result from step 4: 3 | 12 -40 4 17 21
------------------
12 -4
Repeat steps 4 and 5 for the remaining coefficients: 3 | 12 -40 4 17 21
------------------
12 -4 0 51
The last number in the bottom row is the remainder. This is the value of f(3): 3 | 12 -40 4 17 21
------------------
12 -4 0 51 72
So, f(3) = 72.
Therefore, the value of f(3) using synthetic division is 72.
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factor by grouping
5u³+15u²-u-3
Answer:
The answer is [tex](u + 3)(5u^{2} - 1)[/tex]
Consider the time it takes in minutes, for police officers to respond to a 911 call, where a life- threatening crime (an armed robbery, an assault, a shooting) is in progress. For a particular police jurisdiction, the average response time is 26 minutes with a standard deviation of 3 minutes Assuming the data is symmetric and using the Empirical rule, what % of the response times fall between 20 to 32 minutes a. 68% b. 95% c. 86% d. 99.7% e. 50% f. none of the above
The correct answer is b. 95%.
According to the Empirical rule, for a symmetric data set, 68% of the data falls within 1 standard deviation of the mean, 95% falls within 2 standard deviations of the mean, and 99.7% falls within 3 standard deviations of the mean.
In this particular case, the mean response time is 26 minutes and the standard deviation is 3 minutes. Therefore, 1 standard deviation from the mean is 23 to 29 minutes, 2 standard deviations from the mean is 20 to 32 minutes, and 3 standard deviations from the mean is 17 to 35 minutes.
Since the question asks for the percentage of response times that fall between 20 to 32 minutes, we are looking for the percentage of data that falls within 2 standard deviations of the mean. Therefore, the correct answer is 95%.
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d=640897752 &questionld =18 flushed = false 8 cld =7245967 ¢erwin = yes Builder Solve the inequality algebraically. (x+2)/(x-7)>0
The inequality (x + 2)/(x - 7)>0 can be solved algebraically by first subtracting 2 from both sides. This results in the inequality (x - 7) > 2. By dividing both sides by (x-7), the inequality can be simplified to 1>2/x-7. This simplifies further to -7>2/x, or x>-7/2. Therefore, the solution to the inequality is x>-7/2.
In plain terms, this means that a value of x must be greater than -7/2 in order for the inequality to be true. This implies that the value of x must be a number greater than -3.5, since -7/2 is the same as -3.5. Thus, if x is any number greater than -3.5, then the inequality (x + 2)/(x - 7) > 0 will be satisfied.
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Find m∠RTS. PLS HELP IN THE MIDDLE OF A TEST
Cornidegretting marching all de What is the probably going to the A Ched Comider gering a randonner including devine What is the probability of generating av in bad to the decimal ? A Ched Assume 20.1). What is the probability z = 1.842 Answer Find the proportion of obsertions from the STANDARD NORMANDSTRIBUTION et les than -0.9900 Armer Check Find the proportion of observations from the STANDARD NORMAL DISTRIBUTION that we than 2.9000 Araw r Check Feel the proportion of brunetices from the SACARD NORMAL ISRAENUD-2-4200 me 2.400 me 20.1) Ung the STANDARDNENDETALLE band the LOWER w
The probability of generating a value between -0.9900 and 2.9000 from a standard normal distribution is 0.4781. The probability of generating a value between -2.4200 and 2.4200 from a standard normal distribution is 0.9804. The probability of generating a value between -0.9900 and 20.1 from a standard normal distribution is 1.0000.
The standard normal distribution, also called the z-distribution, is a special normal distribution where the mean is 0 and the standard deviation is 1. Any normal distribution can be standardized by converting its values into z scores.The standard normal distribution is one of the forms of the normal distribution. It occurs when a normal random variable has a mean equal to zero and a standard deviation equal to one. In other words, a normal distribution with a mean 0 and standard deviation of 1 is called the standard normal distribution.
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Add/subtract the radical expressions and simplify: (a) \( -2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-3 \sqrt{112 x^{3} y^{2}} \) (b) \( 7 \sqrt[3]{8 x^{2} y}+2 \sqrt[3]{27 x^{5} y^{4}} \)
\( 7 \sqrt[3]{8 x^{2} y}+6 \sqrt[3]{x^{5} y^{4}} \) = \( 13 \sqrt[3]{x^{5} y^{4}} \)
Adding/subtracting radical expressions and simplifying can be done as follows:
(a) \( -2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-3 \sqrt{112 x^{3} y^{2}} \)
\(-2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-3 \sqrt{112 x^{3} y^{2}}\) = \( -2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-3 \sqrt{28 x^{3} \cdot 4 y^{2}}\)
\(-2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-3 \sqrt{28 x^{3} \cdot 4 y^{2}}\) = \( -2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-12 y \sqrt{7 x^{3}}\)
\(-2 y \sqrt{28 x^{3}}+3 x \sqrt{63 x y^{2}}-12 y \sqrt{7 x^{3}}\) = \( -14 y \sqrt{7 x^{3}}+3 x \sqrt{63 x y^{2}}\)
(b) \( 7 \sqrt[3]{8 x^{2} y}+2 \sqrt[3]{27 x^{5} y^{4}} \)
\( 7 \sqrt[3]{8 x^{2} y}+2 \sqrt[3]{27 x^{5} y^{4}} \) = \( 7 \sqrt[3]{8 x^{2} y}+2 \sqrt[3]{3^3 \cdot x^{5} y^{4}} \)
\( 7 \sqrt[3]{8 x^{2} y}+2 \sqrt[3]{3^3 \cdot x^{5} y^{4}} \) = \( 7 \sqrt[3]{8 x^{2} y}+6 \sqrt[3]{x^{5} y^{4}} \)
\( 7 \sqrt[3]{8 x^{2} y}+6 \sqrt[3]{x^{5} y^{4}} \) = \( 13 \sqrt[3]{x^{5} y^{4}} \)
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write an equation in point slope form for a line that passes through(-2,5) and (-1,1)
The equation of line is y = -4x - 3 and the slope is m = -4
What is an Equation of a line?The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept
And y - y₁ = m ( x - x₁ )
y = y-coordinate of second point
y₁ = y-coordinate of point one
m = slope
x = x-coordinate of second point
x₁ = x-coordinate of point one
The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given data ,
Let the equation of line be represented as A
Now , the value of A is
Let the first point be P ( -2 , 5 )
Let the second point be Q ( -1 , 1 )
Now , the slope of the line is m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Substituting the values in the equation , we get
Slope m = ( 1 - 5 ) / ( -1 - ( -2 ) )
On simplifying , we get
Slope m = ( -4 ) / 1
Slope m = -4
Now , the equation of line is y - y₁ = m ( x - x₁ )
y - 5 = -4 ( x - ( -2 ) )
y - 5 = -4 ( x + 2 )
y - 5 = -4x - 8
Adding 5 on both sides , we get
y = -4x - 3
Hence , the equation of line is y = -4x - 3
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Which methods for "thinking out computalion" Gie, mental arithmetic) are correct
a)7+8 Think: 7 plus 7 is 14, plus 1 more is 15
b) 38 - 17
Think: 38 minus 10 is 28, minus 7 more is 21
c) 999 x 3 Think: 1000 threes is 3000 minus 1 three is 2997
d) 150 ÷ 3 Think: what equals 150 x 3, that's 450
The correct methods for mental arithmetic are those that break down the calculation into smaller, easier-to-manage parts and simplify the calculation to make it easier to solve.
The correct methods for "thinking out computation" (mental arithmetic) are a, b, and c.
a) 7+8 Think: 7 plus 7 is 14, plus 1 more is 15. This method is correct because it breaks down the calculation into smaller, easier-to-manage parts.
b) 38 - 17 Think: 38 minus 10 is 28, minus 7 more is 21. This method is also correct because it simplifies the calculation by subtracting 10 first, and then subtracting the remaining 7.
c) 999 x 3 Think: 1000 threes is 3000 minus 1 three is 2997. This method is correct because it simplifies the calculation by multiplying 1000 by 3 first, and then subtracting 1 three to get the correct answer.
d) 150 ÷ 3 Think: what equals 150 x 3, that's 450. This method is incorrect because it is actually doing the opposite operation (multiplication instead of division) and therefore does not result in the correct answer. The correct method would be to think about how many times 3 can go into 150, which is 50.
In conclusion, the correct methods for mental arithmetic are those that break down the calculation into smaller, easier-to-manage parts and simplify the calculation to make it easier to solve.
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The correct methods for "thinking out computation" (mental arithmetic) are:
A) 7+8 Think: 7 plus 7 is 14, plus 1 more is 15
B) 38 - 17 Think: 38 minus 10 is 28, minus 7 more is 21
C) 999 x 3 Think: 1000 threes is 3000 minus 1 three is 2997
D) 150 ÷ 3 Think: what equals 150 x 3, that's 450
All four methods of "thinking out computation" provided in the question are correct and valid.
Method (a) is using the "doubles" method, which is a common mental arithmetic technique. By recognizing that 7+7 is 14, it is easy to add 1 more to get 15.
Method (b) is using the "subtracting by tens" method. By recognizing that 38 minus 10 is 28, it is easy to subtract 7 more to get 21.
Method (c) is using the distributive property of multiplication. By recognizing that 999 is very close to 1000, we can multiply 3 by 1000 and then subtract 3 to get 2997.
Method (d) is using the inverse operation of multiplication. By recognizing that 150 is a multiple of 3, we can think of 150 as 3 times some unknown number, and then determine that number by dividing 150 by 3. The answer is 50, which is the same as thinking of what equals 150 times 3 (450).
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An art teacher has 8 gallons of paint. Her class uses 3/4 of the paint. The teacher divided the rest of the paint into 4 bottles. How much paint is in each bottle?
In response to the given query, the result we have is Hence, each expressions container contains 1/2 gallon of paint.
what is expression ?Multiplying, dividing, adding, and subtracting are all mathematical operations. As an example, consider the following expression: Expression, mathematics, and a numeric value Numbers, parameters, and functions are the components of an expression in mathematics. Using opposing words and phrases is possible. An expression, sometimes referred to as an algebraic expression, is any mathematical statement that includes variables, numbers, and a mathematical action between them. For instance, the expression 4m + 5 is made up of the expressions 4m and 5, as well as the variable m from the previous equation, all of which are separated by the mathematical symbol +.
The remaining paint would be as follows if the art teacher had 8 gallons and the students had used 3/4 of it:
8 x 1 - 3/4 = 8 x 1/4 = 2 gallons.
The 4 bottles of the remaining 2 gallons of paint each contain the following amounts of paint:
1/2 gallon is equal to 2/4.
Hence, each container contains 1/2 gallon of paint.
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