Answer:
y= - 5x+6
Step-by-step explanation:
The ratio of boy to girl who play kickball at rece i 6 to 2. There are 18 girl on the team. What i the nu
mber of boy who play kickball at rece?
The ratio of boy to girl who play kickball at race is 6 to 2. There are 18 girl on the team. the number of boys who play kickball at race is 12 boys.
The ratio of boy to girl who play kickball at race is 6 to 2
6 boys: 2 girls
Multiply the number of girls by the ratio:
18 girls x (6 boys / 2 girls) = 18 x 3 = 54
Subtract the number of girls from the total to get the number of boys:
54 - 18 = 36
Therefore, there are 12 boys who play kickball at race.
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When women were finally allowed to become pilots of fighter jets, engineers needed to redesign the ejection seats because they had been originally designed for men only. The ejection seats were designed for men weighing between 140 lb and 201 lb. Weights of women are now normally distributed with a mean of 162 and a standard deviation of 46 lb . Complete parts (a) through (c) below.
Answer:
(a) What percentage of women would not be able to use the original ejection seats designed for men?
To answer this question, we need to find the percentage of women whose weight is outside the range of 140 lb to 201 lb, which is the weight range for which the original ejection seats were designed. We can do this by standardizing the weight distribution of women using the formula:
z = (x - μ) / σ
where z is the standard score, x is the weight of a woman, μ is the mean weight of women, and σ is the standard deviation of the weight of women.
Substituting the given values, we get:
z = (140 - 162) / 46 = -0.478
z = (201 - 162) / 46 = 0.848
Using a standard normal table or a calculator, we can find that the percentage of women whose weight is below 140 lb (corresponding to a z-score of -0.478) is 31.45%. Similarly, the percentage of women whose weight is above 201 lb (corresponding to a z-score of 0.848) is 19.34%. Therefore, the percentage of women who would not be able to use the original ejection seats designed for men is:
31.45% + 19.34% = 50.79%
(b) What weight range would accommodate 99.7% of the female pilots?
To find the weight range that would accommodate 99.7% of the female pilots, we need to find the z-scores that correspond to the 0.15% and 99.85% percentiles of the standard normal distribution. Using a standard normal table or a calculator, we can find that these z-scores are approximately -2.97 and 2.97, respectively.
Substituting these z-scores into the standardization formula, we get:
-2.97 = (x - 162) / 46
x = 63.88 lb
and
2.97 = (x - 162) / 46
x = 260.12 lb
Therefore, the weight range that would accommodate 99.7% of the female pilots is approximately 63.88 lb to 260.12 lb.
(c) What percentage of women would need ejection seats redesigned for them?
To find the percentage of women who would need ejection seats redesigned for them, we need to find the percentage of women whose weight is outside the weight range that would accommodate 99.7% of the female pilots. Using the values from part (b), we can see that the weight range that would accommodate 99.7% of the female pilots is approximately 63.88 lb to 260.12 lb. Therefore, the percentage of women who would need ejection seats redesigned for them is:
100% - 99.7% = 0.3%
ttthhee maatthhhpleeaasss
jennifer has three more dimes than nickels and three times as many quarters as nickels. if she has $7.50, how many quarters does she have? www.wyzant
Jennifer has 48 nickels, which means she has 144 quarters.
Let's call the number of nickels Jennifer has "n".
Since Jennifer has three more dimes than nickels, she has n + 3 dimes.
And since she has three times as many quarters as nickels, she has 3n quarters.
We can start by figuring out the total value of the nickels and dimes in terms of cents:
n * 5 cents + (n + 3) * 10 cents = 750 cents
Expanding the right side of the equation and solving for n:
5n + 10n + 30 cents = 750 cents
15n + 30 cents = 750 cents
15n = 720 cents
n = 48
So Jennifer has 48 nickels, which means she has 3 * 48 = 144 quarters.
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Karolyn is paid a salary of $4600 a month. What are her total annual earnings?
course grade what is the probability that a randomly selected student earned a b- or better on the quizzes?
Answer:
Without specific information about the distribution of grades or the number of students, we cannot calculate the probability.
The probability that a randomly selected student earned a B- or better on the quizzes is approximately 15.87%, assuming a normal distribution of grades with a mean of 75 and a standard deviation of 5.
We first need to understand the distribution of grades in the class. We assume that the grades are normally distributed, with a mean of μ and a standard deviation of σ. This means that the majority of the grades will be clustered around the mean, with fewer students getting grades farther from the mean.
To find the probability that a randomly selected student earned a B- or better on the quizzes, we need to determine the z-score associated with that grade. A z-score measures the distance between a raw score and the mean, in terms of standard deviations. It tells us how unusual or typical a score is within the distribution.
To calculate the z-score, we use the formula:
z = (x - μ) / σ
Where x is the grade we're interested in, μ is the mean of the distribution, and σ is the standard deviation.
Assuming that a B- is equivalent to a numerical grade of 80, and that the mean quiz grade is 75 with a standard deviation of 5, we can calculate the z-score for a B- as follows:
z = (80 - 75) / 5 = 1
Now that we know the z-score associated with a B-, we can look up the probability of getting a score that high or higher in a normal distribution table or use a calculator. For example, using a table, we can find that the probability of getting a z-score of 1 or greater is about 0.1587. This means that approximately 15.87% of students in the class earned a B- or better on the quizzes.
In conclusion, the probability that a randomly selected student earned a B- or better on the quizzes is approximately 15.87%, assuming a normal distribution of grades with a mean of 75 and a standard deviation of 5.
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Please help me with the circled math question homework
The expressions are simplified to give;
7. 4n³(3n² + 4)
8. -3x(3x² - 4)
9. 5(k² - 8k + 2)
10. -10(6 + 6n² + 5n³)
11. 3(6n³ - 4n - 7)
12. 9(7n³ + 9n + 2)
What are algebraic expressions?Algebraic expressions are defined as mathematical expressions that are composed of variables, coefficients, terms, factors and constants.
These algebraic expressions are also made up of arithmetic operations, such as;
AdditionBracketSubtractionDivisionParenthesesMultiplicationTo factorize the expressions, we have;
12n⁵ + 16n³
Find the common term
4n³(3n² + 4)
-9x³ - 12x
find the common term
-3x(3x² - 4)
5k² - 40k + 10
find the common terms
5(k² - 8k + 2)
-60 + 60n² + 50n³
find the common term
-10(6 + 6n² + 5n³)
18n³ -12n - 21
find the common term
3(6n³ - 4n - 7)
63n³ + 81n + 18
Find the common term
9(7n³ + 9n + 2)
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positive integers $x$ and $y$ have a product of 56 and $x < y$. seven times the reciprocal of the smaller integer plus 14 times the reciprocal of the larger integer equals 4. what is the value of $x$?
By solving a system of equations and a quadratic equation, we will see that x = 2.
How to find the positive integers?We know that x and y are positive integers, that x < y and:
x*y = 56
We also know that "seven times the reciprocal of the smaller integer plus 14 times the reciprocal of the larger integer equals 4"
Then we can write the equation:
7*(1/x) + 14*(1/y) = 4
So we have a system of equations:
x*y = 56
7*(1/x) + 14*(1/y) = 4
We can rewrite the first equation to get:
x = 56/y
And the second equation as:
14/y = 4 - 7/x
Then the system becomes:
56/y = x
14/y = (4 - 7/x)
Taking the quotient between these, we can remove the variable y:
(56/y)/(14/y) = x/(4 - 7/x)
56/14 = x/(4 - 7/x)
4*(4 - 7/x) = x
4*(4x - 7)/x = x
4*(4x - 7) = x^2
So now we have a quadratic equation:
x^2 - 16x + 28 = 0
Using the quadratic formula, we will get:
\(x = \frac{16 \pm \sqrt{(-16)^2 -4*1*28} }{2*1} \\\\x = \frac{16 \pm 12 }{2}\)
So the solutions are:
x = (16 - 12)/2 = 2
x = (16 + 12)/2 = 14
But notice that if x = 14, then:
14 = 56/y
y = 56/14
y = 4
And y is larger than x, then x = 14 can be discarded.
The solution is x = 2.
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express \sqrt{3} - \frac{2}{\sqrt{3} } \(\sqrt{3} - \frac{2}{\sqrt{3} }\)
\(\sqrt{3} - \frac{2}{\sqrt{3} } = \frac{3}{\sqrt{3} } - \frac{2}{\sqrt{3} } = \frac{1}{\sqrt{3} } = \frac{\sqrt{3} }{3}\)
ok done. thank to me :>
Simplify the expression. 2y−5(y−3)=
Answer:
-3y -15
Step-by-step explanation:
2y - 5(y-3) = 2y -5y - 15
= -3y -15
Your welcome, and feel free to comment if you need have any questions!
The simplified value of the expression, 2y−5(y−3) using the Distributive property is 15- 3y.
Given Expression:
2y−5(y−3)
Using Distributive property
\({\text} a *(b+c) = (a *b) + (a*c)\)
So, applying the Distributive property in the expression 5(y - 3) gives
5(y - 3) = 5y - 15
Substituting the value 5y - 15 in 2y−5(y−3) as
2y−5(y−3) = 2y - (5y-15)
= 2y - 5y + 15
Now, operating the simplified value is
2y−5(y−3) = 15 - 3y
Thus, the simplified expression is -3y + 15.
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Figure ABC is to be translated to Figure A'B'C' using the rule (x, y) → (x−2, y+3).
Triangle ABC on the coordinate plane with the ordered pairs for A as 1,1, B as 2,5, and C as 3,2.
Which coordinates will best represent point B'? (4 points)
Image
(4, 2)
(0, 8)
(−1, 7)
(5, 3)
Answer:
(0,8)
Step-by-step explanation:
(2,5) to (0,8)
(2-2,5+3) --> (0,8)
Tom has 13 new magazines to read. Let M be the number of magazines he would have left to Read after reading R of them. Write an equation relating to M to R. Then graph your equation using the axis below
The equation that relates M to R is M = 13 - R
How to determine the equation that relates M to R?From the question, we have the following parameters:
Total number of new magazines = 13Number of magazines read = RNumber of magazines left = MThe total number of new magazines is the sum of the number of magazines read and the number of magazines left
This is represented as
Total number of new magazines = Number of magazines read + Number of magazines left
Substitute the known values in the above equation
13 = R +M
Make M the subject
M = 13 - R
Hence, the equation is M = 13 - R
See attachment for the graph
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what is 22/25 as a equivalent fraction out of 100
Answer:
hope this helps :)
Step-by-step explanation:
The casino game of chuck-a-luck seems quite simple and that it would be a pretty good bet. In this game, three dice are rolled (usually inside a wire cage). You can bet a set amount, let's say $5, on a specific number 1-6. You win the amount of your bet for each appearance of your number on the dice. If the number does not appear, you lose your bet. For example, let's say you bet $5 on the number 3. If it appears on exactly one die, you win $5 (and keep your bet) with probability 75/216. If it appears on exactly two dice, you win $10 (and keep your bet) with probability 15/216. If it appears on all three dice, you win $15 (and keep your bet) with probability 1/216. If it appears on none of the dice, you lose your original $5 bet. Construct the probability distribution for chuck-a-luck and determine your expected winnings on a $5 bet.
The expected winnings on a $5 bet are -0.1157 dollars. This means that on average, you will lose about 11.57 cents for each $5 bet you make.
Therefore, the game is not a good bet, as you are expected to lose money in the long run.
What is the probability distribution?
A probability distribution is a mathematical function that describes the probability of different possible values of a variable.
The probability of winning on a $5 bet on a specific number in chuck-a-luck is determined by the number of ways that the number can appear on the three dice and the total number of possible outcomes.
If the number appears on exactly one die, there are 3 ways that this can happen out of a total of 6^3 = 216 possible outcomes, giving a probability of 3/216 or 1/72.
If the number appears on exactly two dice, there are 3 ways to choose the two dice on which it appears, and 3 ways to choose the third die, giving a total of 33 = 9 ways out of 216 possible outcomes, giving a probability of 9/216 or 1/24.
If the number appears on all three dice, there is only 1 way this can happen out of 216 possible outcomes, giving a probability of 1/216.
If it appears on none of the dice, there are (543) ways this can happen, giving a probability of (54*3)/216 = 20/216.
We can use this information to construct the probability distribution for chuck-a-luck:
x P(x)
-5 (losing the bet) 20/216
5 (winning the bet for one appearance) 1/72
10 (winning the bet for two appearances) 1/24
15 (winning the bet for three appearances) 1/216
To find the expected winnings on a $5 bet, we can multiply the value of each outcome by its corresponding probability, and sum the results:
E(X) = (-5)(20/216) + (5)(1/72) + (10)(1/24) + (15)(1/216)
E(X) = -5/43.2 + 5/72 + 5/12 + 15/216
E(X) = -0.1157
Hence, the expected winnings on a $5 bet are -0.1157 dollars. This means that on average, you will lose about 11.57 cents for each $5 bet you make.
Therefore, the game is not a good bet, as you are expected to lose money in the long run.
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what are all values of x for which the graph of y=x^3-6x^2 is concave downward
The graph of the function y = \(x^3\) - \(6x^2\) is concave downward for the values of x where the second derivative is negative.
In this case, the second derivative of the function is y'' = 6 - 12x. The function is concave downward when 6 - 12x < 0, which simplifies to x > 1/2.
To determine the concavity of the graph of y =\(x^3\)- \(6x^2\), we need to analyze the second derivative y''. Taking the derivative of the function y = \(x^3\) - \(6x^2\) twice, we obtain y'' = 6 - 12x.
For the function to be concave downward, the second derivative y'' must be negative. So we set 6 - 12x < 0 and solve for x. Simplifying the inequality, we find that x > 1/2.
Therefore, the graph of y = \(x^3\) - \(6x^2\) is concave downward for all values of x greater than 1/2.
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help pls asap
answer:
explain:
rate of change:
\(\sf \bold{\dfrac{y_2-y_1}{x_2-x_1} }\)
coordinates taken: (0, 0), (2, 1)
\(\rightarrow \dfrac{1-0}{2-0}\)
\(\rightarrow \dfrac{1}{2}\)
Take 2 points
(-2,-1)(2,1)\(\\ \rm\rightarrowtail m=\dfrac{1+1}{2+2}\)
\(\\ \rm\rightarrowtail m=\dfrac{2}{4}\)
\(\\ \rm\rightarrowtail m=\dfrac{1}{2}\)
Which of the following is a proper use of the id instruction? Old r24, X Id r24, r26 Old r24, varName Old r24, 252 Question 5 Which of the following assembly line instructions will properly increment the pointer X by 1? subi X,-1 adiw XH:XL,1 inc X O inc XH:XL subi XH:XL,-1 O adiw X,1
"Id r24, r26." The explanation for this is that the id instruction is used for indirect addressing, meaning it accesses the value stored at the memory address specified by the register. In this case, r24 is the destination register and r26 is the source register that contains the memory address.
the proper assembly line instruction to increment the pointer X by 1 is "inc X." This instruction increments the value stored in register X by 1. The other options either decrement X or use a different addressing mode that may not work for incrementing a pointer.
the id instruction is used for indirect addressing and "Id r24, r26" is the proper use in this scenario. "Inc X" is the proper instruction to increment the pointer X by 1.
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Suppose [a, b] denotes the average of a and b, and {a, b, c} denotes the average of a, b, and c. What is {{1, 1, 0} [0, 1] 0}
For the notation of average the expression {{1, 1, 0} [0, 1] 0} is evaluates to 0.3889 approximately.
To evaluate the expression {{1, 1, 0} [0, 1] 0}, we need to follow the notation,
[a, b] denotes the average of a and b.
{a, b, c} denotes the average of a, b, and c.
Let's break down the expression step by step
[0, 1]
= (0 + 1) / 2
= 1/2
= 0.5
Now we have {{1, 1, 0} 0.5 0}. We can evaluate the inner expression first.
{1, 1, 0}
= (1 + 1 + 0) / 3
= 2/3
≈ 0.6667
Now we have {0.6667 0.5 0}. We can apply the same notation to find the average,
{0.6667, 0.5, 0}
= (0.6667 + 0.5 + 0) / 3
= 1.1667 / 3
≈ 0.3889
Therefore, the expression {{1, 1, 0} [0, 1] 0} for the notation of average evaluates to approximately 0.3889.
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Find T(v) using the following properties assuming T is a linear transformation. T:P, → Pz; T(22) = x3, T(x + 1) = 0, T(x - 1) = x; ; v=x2 +2 -1 = O 3 Or O 73 +3 Ox3 –
Linear Transformation, T:P -> Pz, T(22) = x3, T(x + 1) = 0, T(x - 1) = x, v=x2 +2 -1, Linearity Property, Distributive Property, T(v) = x³ + x.
Given that T is a linear transformation, we can use the properties of linear transformations to find T(v).
Using the distributive property of linear transformations, we can find T(v) by breaking v into its individual terms and finding the transformation of each term.
So, v = x² + 2 - 1 = x² + 1
T(v) = T(x² + 1)
Since T is a linear transformation, we can use the linearity property to find T(v) as:
T(v) = T(x²) + T(1)
Now, we have to find T(x²) and T(1).
T(x²) = T(x) * T(x) = T(x + 1) + T(x - 1) = 0 + x = x
And T(1) = T(1 * x°) = 1 * T(x°) = 1 * T(22) = 1 * x³ = x³
So,
T(v) = T(x²) + T(1) = x + x³ = x³ + x
Hence, T(v) = x³ + x.
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Molly and Torry like to eat ice cream sandwiches. In one week Molly ate five ice cream sandwiches and Torry ate n ice cream sandwiches. they ate a total of 12 ice cream sandwiches together, right equation describe a situation how many ice cream sandwiches did Torry eat?
\(5 + n = 12 \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \)
Let S2(r) = {x ∈ R3 : |x| = r} for r >
0 and let f : S2 → S2(r) by f(x) = rx. Prove
that f is one-to-one and onto but not an isometry if r /= 1
The function f(x) = rx mapping S2 to S2(r) is one-to-one, onto, but not an isometry if r ≠ 1.
To prove that the function f: S2 → S2(r) defined by f(x) = rx is one-to-one, onto, and not an isometry if r ≠ 1, we'll consider the following:
1. One-to-one: For f to be one-to-one, for every distinct pair of points x, y ∈ S2, we must have f(x) ≠ f(y). Suppose x ≠ y, then rx ≠ ry since r > 0. This shows that f is one-to-one.
2. Onto: To show that f is onto, we must show that for every point y ∈ S2(r), there exists a point x ∈ S2 such that f(x) = y. For y ∈ S2(r), we can find x = (1/r)y, which satisfies |x| = 1, so x ∈ S2. Then f(x) = r(1/r)y = y, proving that f is onto.
3. Not an isometry if r ≠ 1: An isometry is a function that preserves distances between points. If f were an isometry, we'd have |f(x) - f(y)| = |x - y| for all x, y ∈ S2. Consider x, y ∈ S2 with |x - y| = d. Then, |f(x) - f(y)| = |rx - ry| = r|x - y| = rd. If r ≠ 1, rd ≠ d, so f does not preserve distances, and therefore f is not an isometry.
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Charlie solve an equation and go -4 = 4, which means?A. the equation has only 1 solutionB. the equation has no solutionsC. the equation has infinitely many solutions
If he got -4 = 4, the equation has no solution, due that the two numbers are not equal, so they're not an equation
Which are the solutions of x2 = -13x – 4?
Answer:
x=3.75
Step-by-step explanation:
HELP FAST A vertical slice through a three-dimensional solid produces a two-dimensional shape. (shape is a triangle)
Answer:
the surface of "C" would be a triangle if sliced vertically
Step-by-step explanation:
If vertical slice through a three-dimensional solid produces a two-dimensional shape is triangular prism, option C is correct.
What is Three dimensional shape?a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.
If a vertical slice through a three-dimensional solid produces a two-dimensional shape which is a triangle, it means that the solid has a triangular cross-section.
In other words, the cross-section of the solid that is perpendicular to its base is in the shape of a triangle.
A triangular prism is a solid shape that has a triangular cross-section. If you were to take a vertical slice through the prism, the resulting two-dimensional shape would be a triangle.
Hence, if vertical slice through a three-dimensional solid produces a two-dimensional shape is triangular prism
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Two planes leave an airport and fly in opposite directions. One
plane flies at 150 miles/hour and the other plane flies at 120 miles per hour. How many hours will it take for the two planes to be 810 miles apart?
Answer:3
Step-by-step explanation:
Please help!! Thank you!
162 because ya I did that question
one common mistake that many managers make when using a causal forecasting model such as linear and multiple regression is to assume that: a. correlation of variables proves that one variable has caused another variable. b. dependent variables are a mathematical function of something other than time. c. dependent variables and independent variables are related. d. multiple regression is better than linear regression e. predictions can be quantified.
(a) is the correct answer.
One common mistake that many managers make when using a causal forecasting model such as linear and multiple regression is to assume that the correlation of variables proves that one variable has caused another variable. Option (a) is the correct answer.Linear regression, also known as simple regression, is a forecasting technique that analyzes the relationship between an independent variable and a dependent variable. Multiple regression forecasting includes the use of many independent variables. The focus of regression analysis is to make predictions or decisions based on the results of the regression model.The dependent variable is the variable that is being forecasted or analyzed in regression analysis. It is referred to as the predicted or outcome variable. The independent variable is the variable that is believed to be responsible for the dependent variable's variation. It is also referred to as the explanatory variable.In regression analysis, correlation does not equate to causation. Managers should understand that the correlation between two variables does not imply that one variable caused the other. There might be a third variable that is causing both variables to vary. As a result, managers should be cautious when interpreting regression results because correlation does not equate to causation. Correlation can demonstrate the relationship between two variables, but it does not indicate causation.
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Helpppp!! which one is true
Answer:
Option C.J'K'L'M' will still be a rectangle, angles are preserved opposites sides remain equal in lengths and parallel.
Step-by-step explanation:
hope it helps...
have a great day!!
correct 0.00578 to 2 decimal places
(year 9 - British system)
Answer:
0.00578 the answer is 0.0058
the number of students who bike to school is 5% of the number of students who walk. how many students bike to school