please help me out
x-2/x+3≤0
Answers
Answer:
Step-by-step explanation:
Related Questions
6. Maximizing Profits - You want to sell a certain number n of items in order to
maximize your profit. Market research tells you that if you set the price at $1.50, you
will be able to sell 5000 items, and for every 10 cents you lower the price below $1.50
you will be able to sell another 1000 items. Suppose that your fixed costs ("start-up
costs") total $2000, and the per item cost of production ("marginal cost") is $0.50.
Find the price to set per item and the number of items sold in order to maximize
profit, and also determine the maximum profit you can get.
Answers
With a price of $1.25, 7,500 goods would be sold and a profit of $3,635 would be made. This price would maximize profit.
What do we mean by profits?Profit in economics is the difference between an economic entity's revenue from outputs and all of its input costs.
It is equivalent to total income less total expenses, which includes both direct and indirect expenses.
Establishing sales methods and capturing your clients' interest requires first analyzing how profitable your goods and services are.
So, since you need to sell a certain number of items to maximize your profit, setting the price at $ 1.50 will enable you to sell 5000 items, and lowering the price by $10 will enable you to sell an additional 1000 items.
Assuming your fixed costs total $ 2000 and the cost of production per item is $ 0.50, you must determine the price to set per item, the number of items sold, and the maximum profit.
(5000 x 1.50) - (5000 x 0.50) - 2000 = 3000
(6000 x 1.40) - (6000 x 0.50) - 2000 = 3400
(7000 x 1.30) - (7000 x 0.50) - 2000 = 3600
(8000 x 1.20) - (8000 x 0.50) - 2000 = 3600
(7500 x 1.25) - (7500 x 0.50) - 2000 = 3625
Therefore, with a price of $1.25, 7,500 goods would be sold and a profit of $3,635 would be made. This price would maximize profit.
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Correct question:
You want to sell a certain number n of items in order to maximize your profit. Market research tells you that if you set the price at $1.50, you will be able to sell 5000 items, and for every 10 cents you lower the price below $1.50 you will be able to sell another 1000 items. Suppose that your fixed costs (“start-up costs”) total $2000, and the per item cost of production (“marginal cost”) is $0.50.
Solve the above engineering problem using calculus.
Hints: Find the price to set per item and the number of items sold in order to maximize profit, and also determine the maximum profit you can get.
To achieve M3, you must present your work using coherent, logical development of principles/concepts in determining the maximum profit and use technical language accurately.
To achieve D1, you must evaluate the validity of your answer using the given data.
5 yards of shirt fabric cost nine dollars how much does 12 yards of the same fabric cost? Please help me understand if you could!!!
Answers
This shows the net of a triangular prism.
What is the surface area of the prism?
3,900 m2
4,200 m2
4,800 m2
12,000 m2
Answers
Step-by-step explanation:
Two rectangles 2 x 25 x 40
one rectangle 40 x 40
two triangles (Area = 1/2 * base * height)
2 x 1/2 * 40 * 15
Total = 4200 m^2
two forces are acting upon an object F1 is 10N and is being applied at a 270 angle with the positive x-axis...
here's the answers:
Answers
The components of force F1 are F1x = 0N (along the x-axis) and F1y = -10N (along the y-axis).
To determine the components of the two forces acting upon an object with F1 = 10N at a 270° angle with the positive x-axis,
follow these steps:
Step 1: Convert the angle to a standard position
Since the angle is given in degrees and with respect to the positive x-axis, it is already in the standard position.
Step 2: Find the x and y components of F1
To find the components of F1, we'll use trigonometry.
At 270°, the force is pointing straight down along the negative y-axis.
So, the x-component (F1x) is 0, and the y-component (F1y) is -10N.
F1x = F1 * cos(270°) = 10N * 0 = 0N
F1y = F1 * sin(270°) = 10N * (-1) = -10N.
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Rewrite as a logarithmic equation : e^2 =x
Answers
Answer:
e^2 = x, so ln(e^2) = ln x
ln x = 2
Find the inverse of the function.
y = x² + 4x + 4
y =
1
-X+2
2
1
y=± √ √=x+2
Oy=± √√x-2
y = √√x -2
Answers
To find the inverse of the function y = x² + 4x + 4, we first replace y with x and x with y:
x = y² + 4y + 4
Next, we rearrange the equation to isolate y on one side of the equation:
x - 4 = y² + 4y
y² + 4y = x - 4
Now, we complete the square by adding (4/2)² = 4 to both sides of the equation:
y² + 4y + 4 = x
We can rewrite the left side of the equation as (y + 2)²:
(y + 2)² = x
Finally, we take the square root of both sides of the equation and solve for y:
y + 2 = ±√x
y = ±√x - 2
Since the original function is not one-to-one, we need to restrict the domain to obtain the inverse function. Specifically, we restrict the domain of the original function to x ≥ -2, since for values of x less than -2 there are two corresponding y-values. Therefore, the inverse function of y = x² + 4x + 4 for this restricted domain is:
y = ±√x - 2, x ≥ -2
PLS HELPP I NEED ASAP
Answers
Answer:
Let's call the number of nuts "n", the number of bolts "b", and the number of screws "s".
From the problem, we know:
s = 3n (Since there are 3 times as many screws as nuts)
b = n + 32 (Since there are 32 more bolts than nuts)
n + s + b = 782 (Since the total number of nuts, screws, and bolts is 782)
Now we can use substitution to solve for one of the variables in terms of the others. Let's solve for "n":
n + 3n + (n + 32) = 782
5n + 32 = 782
5n = 750
n = 150
Now we know there are 150 nuts. We can use this information to find the number of bolts:
b = n + 32
b = 150 + 32
b = 182
Finally, we can use the information we have about the screws to find their number:
s = 3n
s = 3(150)
s = 450
Therefore, there are 450 screws in the box.
answer 1646
let nuts be-782
screw=3X nuts
bolts = 32 X nuts
Screw=3x782=1646
hope this helps
a good hypothesis group of answer choices does not need a control. can be accepted or rejected. does not require repeated experimentation. all of the above none of the above
Answers
The hypothesis can be accepted or rejected based on the results of the experiment.
A good hypothesis from the given group of answer choices can be accepted or rejected. It is important for a hypothesis to be testable and falsifiable, which means that it should be possible to support or disprove it through experimentation or observation.
A control is necessary in experiments to compare the results and determine if the independent variable has an effect on the dependent variable.
Repeated experimentation is essential to ensure the validity and reliability of the results obtained.
Therefore, the correct answer is none of the above.
A hypothesis is an educated guess or a proposed explanation for an observation or a scientific problem.
In order to be considered a good hypothesis, it should have the following characteristics:
1. Testable and falsifiable: A good hypothesis should be possible to test through experimentation, observation, or other scientific methods. This means that it should be possible to gather evidence that either supports or disproves the hypothesis.
2. Clearly stated: A good hypothesis should be stated clearly and concisely, so that it is easy to understand what is being proposed and what the expected outcome is.
3. Based on existing knowledge: A good hypothesis should be based on existing knowledge and previous research. This means that it should be grounded in known facts, theories, or observations.
4. Specific: A good hypothesis should be specific in its predictions, making it easier to test and providing clearer results.
In conclusion, a good hypothesis can be accepted or rejected, should be testable and falsifiable, requires a control, and requires repeated experimentation to ensure the reliability and validity of the results.
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Solve the system of equations.
6x – y = 6
6x2 – y = 6
(0, 6) and (0, –6)
(1, 0) and (0, –6)
(2, 6) and (1, –11)
Answers
Solve by Graphing shown
The perimeter of the shape below is 84 feet. What is the area (in square feet)?
The dimensions are as follows for a rectangle:
6x and 4x+2
Answers
Answer:
432 square feet
Step-by-step explanation:
12x+8x+4=84
20x=80
x=4
6(4)=24
4(4)+2=18
24 x 18 = 432
pls help me, I have to give it in, pls help!!
Answers
By algebra properties, the values of x for each equation are listed below:
Case A: x = 0
Case B: x = 0
Case C: x = 1.584 or x = 1
Case D: x = 1.262 or x = - 0.631
Case E: x = 0.569
Case F: x = 2 or x = 1.322
How to solve equations involving exponential expressions
In this problem we find six cases of equations containing exponential expressions where the value of x must be found. This can be done by means of algebra properties:
Case A
2²ˣ - 2 ˣ⁺¹ + 1 = 0
(2ˣ)² - 2 · 2ˣ + 1 = 0
u² - 2 · u + 1 = 0
(u - 1)² = 0
u = 1
2ˣ = 1
x · ㏒₂ 2 = ㏒₂ 1
x = ㏒₂ 1
x = 0
Case B
3²ˣ - 3ˣ = 0
(3ˣ)² - 3ˣ = 0
3ˣ · (3ˣ - 1) = 0
3ˣ - 1 = 0
3ˣ = 1
x = 0
Case C
2²ˣ - 5 · 2ˣ + 6 = 0
(2ˣ)² - 5 · 2ˣ + 6 = 0
u² - 5 · u + 6 = 0
(u - 3) · (u - 2) = 0
u = 3 or u = 2
2ˣ = 3 or 2ˣ = 2
x = ㏒₂ 3 or x = 1
x = 1.584 or x = 1
Case D
2 · (3²ˣ) - 9 · 3ˣ + 4 = 0
2 · u² - 9 · u + 4 = 0
2 · [u² - (9 / 2) · u + 2] = 0
2 · (u - 4) · (u - 1 / 2) = 0
u = 4 or u = 1 / 2
3ˣ = 4 or 3ˣ = 1 / 2
x = ㏒₃ 4 or x = ㏒₃ (1 / 2)
x = 1.262 or x = - 0.631
Case E
6 · (5²ˣ) - 11 · 5ˣ - 10 = 0
6 · u² - 11 · u - 10 = 0
6 · [u² - (11 / 6) · u - 5 / 3] = 0
6 · (u - 2.5) · (u + 0.667)
u = 2.5 or u = - 0.667
x = 0.569
Case F
2²ˣ⁺¹ - 13 · 2ˣ + 20 = 0
2 · (2ˣ)² - 13 · 2ˣ + 20 = 0
2 · u² - 13 · u + 20 = 0
2 · [u² - (13 / 2) · u + 10] = 0
2 · (u - 4) · (u - 5 / 2) = 0
u = 4 or u = 5 / 2
2ˣ = 4 or 2ˣ = 5 / 2
x = 2 or x = 1.322
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many clothing stores use mannequins to display their goods, with many stores using headless mannequins while some use mannequins with a head. the same dress was presented to 95 women on either a mannequin with or without a head. 18 of the 50 women who saw the dress on a mannequin with a head indicated they would purchase the dress while 12 of the 45 who saw the dress on a headless mannequin said they would purchase the dress. is this evidence that a headed mannequin is more effective in selling clothing? perform a hypothesis test.
Answers
Using the hypothesis test, the p-value is greater than the significance level, we fail to reject the null hypothesis. There is not enough evidence to suggest that a headed mannequin is more effective in selling clothing.
To perform a hypothesis test to determine if a headed mannequin is more effective in selling clothing, we can use a two-sample proportion test.
Let p1 be the proportion of women who would purchase the dress when presented on a mannequin with a head, and p2 be the proportion of women who would purchase the dress when presented on a headless mannequin.
The null hypothesis is that there is no difference between the two proportions, i.e. p1 = p2, and the alternative hypothesis is that p1 > p2 since we want to test if the headed mannequin is more effective.
We can use a significance level of 0.05. Using the given data, we calculate the test statistic as:
z = (p1 - p2) / √(p × (1-p) × (1/n1 + 1/n2))
where p = (x1 + x2) / (n1 + n2), x1 = 18, x2 = 12, n1 = 50, and n2 = 45.
The calculated z-value is approximately 1.02.
Using a standard normal distribution table, we find the p-value to be approximately 0.155.
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at the town flea market, monica purchases a big box of used tennis balls to throw to her dog. she scoops some tennis balls out of the box at random. here are the colors of the balls: yellow, blue, yellow, red, green, blue, yellow, red, yellow, green, yellow, red, green based on the data, what is the probability of choosing a yellow tennis ball from the box? write your answer as a fraction or whole number. submit
Answers
Answer: 5/13
Step-by-step explanation: i did this IXL and got it right
or
Find WX.
4
W
X
Y
49°
Write your answer as an integer or as a decimal rounded to the nearest tenth.
Answers
The length of side WX is 2.61 units
Trigonometric ratios:
Trigonometric ratios are mathematical relationships that describe the proportions between the sides of a right triangle. There are three main trigonometric ratios: sine, cosine, and tangent.
Cosine (cos) is defined as the ratio of the length of the side adjacent to the angle to the length of the hypotenuse of the right triangle. It is expressed as cosθ = adjacent/hypotenuse.
Here we have
The triangle XYW is right-angled
Where Hypotenues WY = 4
The measure of angle W = 49°
From triangonometric ratios
Cos θ = Adjacent/Hypotenuse.
Cos 49° = WX/4
0.6561 = WX/4 [ Since Cos 49° = 0.6561 ]
=> WX = 4(0.6561)
=> WX = 2.6244
=> WX = 2.61
Therefore,
The length of side WX is 2.61 units
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select all of the expressions that are equivalent to 4√5
2√20
6^1/2- 5^1/2
3 x 5^1/2 +5^1/2
4 x 5^1/2
2√10
3 x 5^1/2
Answers
The expressions that are equivalent to 4√5 is
A) 2√20
C) [tex]3\sqrt5+\sqrt5[/tex]
D) [tex]4\times 5^{1/2}[/tex]
What is expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Unknown variables, integers, and arithmetic operators are the components of an algebraic expression. There are no symbols for equality or inequality in it.
Here the given expression is [tex]4\sqrt5[/tex].
Now simplifying the given option expressions then,
A) [tex]2\sqrt{20}[/tex] = [tex]2\sqrt{4\times5}[/tex]
= [tex]2\times2\sqrt{5}[/tex]
= [tex]4\sqrt5[/tex]
B) [tex]6^{1/2}-5^{1/2}[/tex]
[tex]= \sqrt6-\sqrt5[/tex]
C) [tex]3\sqrt5+\sqrt5[/tex]
= [tex]4\sqrt5[/tex]
D) [tex]4\times 5^{1/2}[/tex]
[tex]= 4\sqrt5[/tex]
E) [tex]2\sqrt{10}[/tex]
F) [tex]3\times5^{1/2}[/tex]
[tex]=3\sqrt5[/tex]
Hence the expressions that are equivalent to 4√5 is
A) 2√20
C) [tex]3\sqrt5+\sqrt5[/tex]
D) [tex]4\times 5^{1/2}[/tex]
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Cuanto es ¿2x-3=6+x?????????
Answers
Answer: x=9
Step-by-step explanation:
2x-3=6+x
Add similar variables.
2x-3=6+x
+3 +3
2x=9+x
-x -x
x=9
Hope this helped!
Answer:
x=9
Step-by-step explanation:
primero, tomas y restas x de ambos lados.
2x-3=6+x
-x. - x
eso te deja con x-3=6. luego sumas 3 a ambos lados
x-3=6
+3. +3
eso te deja con x=9
The value of a collectible coin can be represented by the equation y = 2X+ 9.74, where x represents the number of
vears that Consuello has owned the coin and y represents the total value, in dollars, of the coin. What was the value of the coin when Consuello originally purchased it?
Answers
The value of the coin when Consuello originally purchased it was $9.74.
What is the value of coin?
The given equation is y = 2x + 9.74, where x represents the number of years that Consuello has owned the coin and y represents the total value of the coin in dollars.
To find the value of the coin when Consuello originally purchased it, we need to find the value of y when x = 0.
Substituting x = 0 in the equation, we get:
y = 2(0) + 9.74
y = 0 + 9.74
y = 9.74
Therefore, the value of the coin when Consuello originally purchased it was $9.74.
What is coin?
A coin is a small, flat, round piece of metal or other material used as money to buy goods and services. It is typically issued by a government or other authority as legal tender and has a fixed value that is recognized within a specific country or region. Coins can be made from various metals, such as copper, nickel, silver, and gold, and often feature engravings or other designs that are intended to make them difficult to counterfeit.
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Addition and Subtraction of polynomials
PLEASE SOLVE THIS I NEED THIS ASAP
Answers
The polynomial that represents the profit is P(x) = 6x^2z + 8x^2 + 18xz + 24x + 12z + 16.To find the polynomial that represents the profit P(x), we need to multiply the revenue polynomial R(x) by the cost polynomial C(z). We can set up the multiplication as:
P(x) = R(x) * C(z)
P(x) = (2x^2 + 6x + 4) * (3z + 4)
Using the distributive property, we can multiply each term of the first polynomial by each term of the second polynomial:
P(x) = (2x^2 * 3z) + (2x^2 * 4) + (6x * 3z) + (6x * 4) + (4 * 3z) + (4 * 4)
Simplifying each term, we get:
P(x) = 6x^2z + 8x^2 + 18xz + 24x + 12z + 16
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how do you solve 2×(6÷2+8)- 4? please help I need a answer and explanation.
Answers
Answer:
18
Step-by-step explanation:
remember parenthesis, always first then left to right so 6/2 is 3 +8 is 11 the x 22 is 22 then - 4 is 18 so your answer is 18
HELP!!!!! Please. I really need it.
Answers
Let's call the price of the motorcycle "x".
We know that Lenny paid 12.5% in tax, which is the same as 0.125 as a decimal.
To find out how much tax Lenny paid, we can multiply the price of the motorcycle by 0.125:
0.125x = $1437.50
Now we can solve for x by dividing both sides by 0.125:
x = $11,500
Therefore, the price of the motorcycle, not including tax, was $11,500.
Answer:
Your question is:
1437.5 is 12.5% of what number?
1437.5 = 0.125x
x = 1437.5/.125 = $11,500
Therefore, the answer is $11,500!
Step-by-step explanation:
Please brainliest if the helped you a lot! And tell me if I am wrong! I would be so sorry if it was wrong! :D
jenny chagrined to find that the ratio of dandelions to peonies in the garden was 12 to 5 if there were 45 peonies in the garden how many dandelions were there?
Answers
Accοrding tο the ratiοs, there are 108 dandeliοns in the garden.
What is a ratiο?A ratiο is a cοmparisοn οf twο quantities οr values, οften expressed as a fractiοn. Ratiοs can be used tο express the relatiοnship between twο οr mοre quantities.
We can use the ratiο οf dandeliοns tο peοnies tο find the number οf dandeliοns when we knοw the number οf peοnies.
The ratiο οf dandeliοns tο peοnies is 12 tο 5, which means that fοr every 12 dandeliοns, there are 5 peοnies.
We knοw that there are 45 peοnies in the garden, sο we can set up a prοpοrtiοn tο find the number οf dandeliοns:
12/5 = x/45
Tο sοlve fοr x, we can crοss-multiply and simplify:
12*45 = 5x
540 = 5x
x = 108
Therefοre, there are 108 dandeliοns in the garden.
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find the probability of tossing two dice and showing at least a 4 or the sum of dice is precisely 7
Answers
The probability of tossing two dice and showing at least a 4 or the sum of dice is precisely 7 is 5/12 or approximately 0.417.
To find the probability of tossing two dice and showing at least a 4 or the sum of dice is precisely 7, we need to add the probabilities of these two events happening.
The probability of rolling at least a 4 on one die is 3/6, or 1/2 because there are three ways to roll a number greater than or equal to 4 (4, 5, or 6) out of six possible outcomes. The probability of rolling at least a 4 on both dice is the product of the probabilities of rolling at least a 4 on each die, which is (1/2) x (1/2) = 1/4.
The probability of rolling a sum of 7 on two dice is 6/36, or 1/6 because there are six possible ways to roll a sum of 7 (1+6, 2+5, 3+4, 4+3, 5+2, or 6+1) out of 36 possible outcomes.
To find the probability of rolling at least a 4 or a sum of 7, we need to subtract the probability of rolling both from the total probability of rolling either. The total probability of rolling at least a 4 or a sum of 7 is the sum of their probabilities minus the probability of rolling both, which is:
(1/2) + (1/6) - (1/4) = 5/12
Therefore, the probability of tossing two dice and showing at least a 4 or the sum of dice is precisely 7 is 5/12 or approximately 0.417.
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pat designs a patio with a trapezoid shaped deck consisting of 16 rows of congruent slate tiles. the numbers of tiles in the rows form an arithmetic sequence. the first row contains 15 tiles and the last row contains 30 tiles. how many tiles are used in the deck?
Answers
Let d be the common difference between the rows. We can write the following equation:
15 + 15d = 30
Solving for d:
15d = 30 - 15
15d = 15
d = 1
Now that we know the common difference is 1, we can use the arithmetic series formula to find the total number of tiles used in the deck:
S = n * (a1 + an) / 2
Here,
S = total number of tiles
n = number of rows (16)
a1 = number of tiles in the first row (15)
an = number of tiles in the last row (30)
S = 16 * (15 + 30) / 2
S = 16 * 45 / 2
S = 16 * 22.5
S = 360
So, Pat used a total of 360 tiles for the trapezoid-shaped deck.
Answer:360
The number of tiles used in the deck is 525. This can be answered by the concept of arithmetic sequence.
Let x be the number of tiles in each row in the arithmetic sequence. Then, the sum of the number of tiles in all 16 rows can be expressed as the sum of an arithmetic series:
S = (n/2)(a + l),
where n is the number of terms, a is the first term, and l is the last term. In this case, n = 16, a = 15, l = 30, and x is the common difference, which can be found by using the formula:
x = (l - a) / (n - 1)
Substituting the values given, we get x = 1.25. Therefore,
S = (16/2)(15 + 30) = 525.
Therefore, the total number of tiles used in the deck is 525.
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can I have the answer? It’s for completing the square
Answers
So, the equation of the given curve is a circle centered at (-13, 13) with a radius of 3. Therefore, the correct option is:
[tex](x + 13) ^ 2 + (y - 13) ^ 2 = 9[/tex].
What is equation?An equation is a mathematical statement that shows the equality between two expressions, typically separated by an equal's sign (=). Equations are used to represent a wide range of mathematical and scientific relationships, such as physical laws, chemical reactions, and statistical models. The expressions on either side of the equals sign can contain variables, constants, and mathematical operations, and solving the equation involves finding the value or values of the variables that make the equation true. Equations can take many forms, including linear equations, quadratic equations, trigonometric equations, and differential equations, among others.
To determine which option is correct, we can try to convert the given equation to the standard form of the equation of a circle, which is:
[tex](x - h)^2 + (y - k)^2 = r^2[/tex]
where (h, k) is the center of the circle and r is the radius.
We can complete the square for the given equation by adding and subtracting appropriate constants:
[tex]x^2 + 26x + y^2 - 26y + 329 = 0[/tex]
[tex](x^2 + 26x + 169) + (y^2 - 26y + 169) = -329 + 2(169)[/tex]
[tex](x + 13)^2 + (y - 13)^2 = 9[/tex]
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A researcher estimates that a fossil is 3200 years old.Using carbon-14 dating,a procedure used to determine the age of an object,the researcher discovers that the fossil is 3600 years old.
a.Find the percent error
b.what other estimates gives the same percent error?Explain your reasoning
Answers
The percentage error between the estimated age and the carbon-14 dating age of the fossil is 12.5% and an estimated age of approximately 2978 years would give the same percent error of 12.5%.
What is the definition of percentage?
Percentage is a way of expressing a fraction or proportion as a part of 100. It is denoted by the symbol "%". The term "percent" means "per hundred". For example, if 50% of a group of people are men, it means that 50 out of every 100 people in the group are men.
Now,
a). To find the percent error between the estimated age and the carbon-14 dating age of the fossil, we can use the formula:
percent error = |(estimated age - carbon-14 dating age) / estimated age| x 100%
Substituting the given values, we get:
percent error = |(3200 - 3600) / 3200| x 100%
= |-400 / 3200| x 100%
= 12.5%
Therefore, the percent error between the estimated age and the carbon-14 dating age of the fossil is 12.5%.
b). To find other estimates that give the same percent error, we can use the formula:
percent error = |(estimated age - carbon-14 dating age) / estimated age| x 100%
If we let x be the estimated age that gives the same percent error, then we can write:
12.5% = |(x - 3600) / x| x 100%
Simplifying, we get:
0.125 = |(x - 3600) / x|
Taking the positive square root of both sides (since percent error cannot be negative), we get:
√0.125 = (x - 3600) / x
Simplifying, we get:
x = 3600 / (1 - √0.125)
x ≈ 2978
Therefore, an estimated age of approximately 2978 years would give the same percent error of 12.5% as the original estimated age of 3200 years. This means that if the fossil were actually 2978 years old, the carbon-14 dating would have given an age estimate of approximately 3299 years, which is 12.5% higher than the true age.
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Solve the expression 9 + (20 x one-fourth) – 6 ÷ 2 using PEMDAS.
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Answers
The value of the expression 9 + (20 x one-fourth) – 6 ÷ 2 is 11.
What is PEMDAS?
PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right). It is a mnemonic or acronym used to remember the order of operations when simplifying mathematical expressions.
Using PEMDAS (Order of Operations), we perform the operations in the following order:
Parentheses
Exponents
Multiplication and Division (from left to right)
Addition and Subtraction (from left to right)
Applying this to the given expression:
9 + (20 x one-fourth) – 6 ÷ 2
= 9 + (20 x 0.25) - 3 [simplify division first: 6 ÷ 2 = 3]
= 9 + 5 - 3 [simplify multiplication: 20 x 0.25 = 5]
= 11 [simplify addition and subtraction from left to right]
Therefore, the value of the expression is 11.
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Line segment AB has endpoints A(1, 4) and B(4. 2j. Find the coordinates of the point that divides the line segment directed from A to B
in the ratio of 1:4
Answers
The coordinates of the point that divides the line segment directed from A to B in the ratio of 1:4 is (8/5, (16 + 8j)/5).
We can use the ratio formula for finding the coordinates of the point that divides the line segment AB in the ratio of 1:4:
Let the coordinates of the point dividing the line segment AB be (x, y). Then:
x = (41 + 14)/5 = 8/5
y = (44 + 42j)/5 = (16 + 8j)/5
Therefore, the coordinates of the point that divides the line segment AB in the ratio of 1:4 are (8/5, (16 + 8j)/5).
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Find the x- and y-intercepts of the graph of x+7y=12. State each answer as an integer or an improper fraction in simplest form
Answers
The x-intercept is (12, 0) and the y-intercept is (0, 12/7) or (0, 1 5/7) in mixed number form.
What are the intercepts?
Intercepts are the points where the graph intersects either the x-axis or the y-axis. The x-intercept is the point where the graph intersects the x-axis, which means the y-coordinate of the point is 0. The y-intercept is the point where the graph intersects the y-axis, which means the x-coordinate of the point is 0. To find the intercepts of a function, you can set one of the variables (x or y) to 0 and solve for the other variable. The resulting point will be the intercept.
To find the x-intercept, we set y to zero and solve for x:
x + 7(0) = 12
x = 12
So the x-intercept is (12, 0).
To find the y-intercept, we set x to zero and solve for y:
0 + 7y = 12
y = 12/7
So the y-intercept is (0, 12/7) or (0, 1 5/7) in mixed number form.
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Line A passes through the points (-1, 5) and (3, 21).
Line B passes through the points (4, -2) and (-3, 19).
Find the point where line A intersects line B.
Answers
Answer:
A line's angle of slope between two points is (5, -4).
Step-by-step explanation:
Explanations are given in attachment!
if northwest airlines selects randomly a set of 40 flights on a given day, and then selects randomly a group of ten passengers on each of these flights to participate in an in-flight survey, the passengers are best referred to as a .
Answers
The passengers selected for the in-flight survey in this scenario can be best referred to as a stratified random sample.
In stratified random sampling, the population is divided into smaller, non-overlapping groups, called strata, which share similar characteristics. In this case, the strata are the 40 flights selected by Northwest Airlines. From each of these strata, a random sample of passengers is chosen, which in this case, is a group of ten passengers from each flight.
This method ensures that each flight's passengers are represented in the survey, allowing for better generalizability of the results. By selecting passengers randomly within each stratum, the survey helps minimize selection bias and ensures that the sample reflects the diversity of the overall population of passengers. The stratified random sampling approach is especially useful when studying a large and diverse population, as it provides a more accurate representation of the population's characteristics compared to simple random sampling.
In summary, the passengers participating in the in-flight survey are best referred to as a stratified random sample because they are chosen from 40 randomly selected flights, with ten passengers randomly selected within each flight. This sampling approach ensures better representation of the overall population and helps minimize selection bias in the survey results.
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