PLEASE help mee. Explain and show work plsss.

Answer:

EZ PZ bruh

Step-by-step explanation:

First one, -25/4 ÷ -5 5/4

change the second mixed fraction into an improper one

=> -25/4 ÷ -25/4; dividing a number by itself gives you '1'

=> 1

second question,

=> -3/21 × -3; multiply the numerator with the other numerator, and since there is nothing given in the denominator of the second number mean its 1, hence multiply the denominator with the other denominator, and we get:

=> 9/21; we simplify this fraction and get: 3/7

feeneeshed :D

Answer: C=2*3.14*r

Step-by-step explanation:

You just plug in 3.14 for pi, it's pretty simple

Answer:

C) neither

Step-by-step explanation:

they add up to 190

complementary adds up to 90

supplementary adds up to 180

Answer:

supplementary

Step-by-step explanation:

sum = 180

Answer:

--------------------------

The nth term is visible in the sum:

Apply n = 10 to find the 10th term:

The matching choice is C.

The z-values for the given situations are approximate:

a. The area to the left of z is 0.1827. z = -0.90

b. The area between −z and z is 0.9830. z = 2.17

c. The area between −z and z is 0.2148. z = 0.85

d. The area to the left of z is 0.9997. z = 3.49

e. The area to the right of z is 0.6847. z= -0.48

a. For an area of 0.1827 to the left of z, the corresponding z-value can be found using a standard normal distribution table or a statistical calculator. The z-value is approximately -0.90.

b. To find the z-value for an area between -z and z equal to 0.9830, we need to find the value that corresponds to (1 - 0.9830)/2 = 0.0085 in the upper tail of the standard normal distribution. Using the table or calculator, the z-value is approximately 2.17.

c. Similarly, for an area between -z and z equal to 0.2148, we find the value that corresponds to (1 - 0.2148)/2 = 0.3926 in the upper tail. The z-value is approximately 0.85.

d. For an area of 0.9997 to the left of z, we find the value that corresponds to 0.9997 in the upper tail. The z-value is approximately 3.49.

e. To find the z-value for an area to the right of z equal to 0.6847, we find the value that corresponds to 1 - 0.6847 = 0.3153 in the upper tail. The z-value is approximately -0.48.

In summary, the z-values for the given situations are approximate:

a. -0.90

b. 2.17

c. 0.85

d. 3.49

e. -0.48

These values can be used to determine the corresponding percentiles or probabilities for the standard normal distribution. The values are typically found using standard normal distribution tables or statistical calculators that provide the cumulative probability distribution function (CDF) for the standard normal distribution.

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When a system of equations has infinitely many solutions, it is considered consistent and dependent.

This means that the equations are not contradictory and there are multiple solutions that satisfy both equations. In contrast, an inconsistent system of equations has no solutions and a consistent, independent system has exactly one unique solution.

For the given system of equations y = x + 5 and y = -5x - 1, we can see that both equations can be rearranged to the form y = mx + b, where m represents the slope and b represents the y-intercept. In this case, the slopes are different (-5 and 1) and the y-intercepts are different (-1 and 5). Therefore, the two lines intersect at a single point and the system has only one solution. So, the answer is option 4 - two.

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Answer:

1st box is "a 90°clockwise rotation about the origin

2nd box is "a 180° rotation about the origin

3rd box is "a 90° counterclockwise rotation about the origin

The parameterized plane that contains the three points is r(s,t) = (1,−2,−5) + s(−11,−4,−7) + t(14,22,15).

To parameterize the plane that contains the three points (1,−2,−5), (−10,−6,−12), and (15,20,10), we can use a vector equation.

We can choose any of the given points as r. Let's choose (1,−2,−5) as our r

r = (1,−2,−5).

To find v, we need to subtract r from any two points on the plane. Let's choose (−10,−6,−12) and (15,20,10) as our points.

⃗v = (−10,−6,−12) - (1,−2,−5) = (−11,−4,−7).

Similarly, we can subtract r from another pair of points. Let's choose (−10,−6,−12) and (15,20,10) again.

⃗w = (15,20,10) - (1,−2,−5) = (14,22,15).

Now we have all the necessary components to parameterize the plane.

r(s,t) = (1,−2,−5) + s(−11,−4,−7) + t(14,22,15).

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Based on the results of the linearhypothesis function, we can conclude whether the hypothesis in part (b) is supported or not.

Linear hypothesis is a method of testing statistical hypotheses by estimating the parameters of a linear equation. This method of testing hypotheses involves estimating the parameters of a linear equation using a sample of data to determine if the parameters differ significantly from zero.

We can estimate the given model using the data in vote1. To do this, we will fit a linear regression model with the two independent variables (a's expenditures and b's expenditures) and the dependent variable (outcome). We can then use the model to determine whether a's expenditures have an effect on the outcome. We can do this by testing whether the coefficient for a's expenditures is statistically significant. If the coefficient is not statistically significant, then this means that a's expenditures do not have an effect on the outcome. We can also use the model to determine whether b's expenditures have an effect on the outcome. We can do this by testing whether the coefficient for b's expenditures is statistically significant. If the coefficient is not statistically significant, then this means that b's expenditures do not have an effect on the outcome. These results can be used to test the hypothesis in part (b). We can use the linearhypothesis function to test the hypothesis at a 5% significance level. If the test is found to be statistically significant, then this means that the hypothesis is supported. If the test is not statistically significant, then this means that the hypothesis is not supported.  Based on the results of the linearhypothesis function, we can conclude whether the hypothesis in part (b) is supported or not.

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Answer:

look at the screenshot

Step-by-step explanation:

Answer:

Is Square Root of 25 Rational or Irrational?  

Step-by-step explanation:

A rational number can be expressed in the form of p/q. Because √25 = 5 and 5 can be written in the form of a fraction 5/1. It proves that √25 is rational.

The answer is:

Work/explanation:

What are rational numbers?

Rational numbers are integers and fractions.

Irrational numbers are numbers that cannot be expressed as fractions, such as π.

Now, \(\bf{\sqrt{25}}\) can be simplified to 5 or -5; both of which are rational numbers.

Answer: A

\(256a^{20} b^{24}\)

To test the belief that the average tenure of a U.S. worker is 4.6 years, we can conduct a one-sample hypothesis test. Let's define the null hypothesis (H₀) and the alternative hypothesis (H₁):

H₀: The average tenure of a U.S. worker is 4.6 years.

H₁: The average tenure of a U.S. worker is not equal to 4.6 years.

To perform this test, we need a sample of worker tenures. We can collect data on the tenure of a representative sample of U.S. workers. Once we have the data, we can use Excel to calculate the necessary statistics and conduct the hypothesis test.

In Excel, we can use the T.TEST function to perform the one-sample t-test. The function takes the sample data, the expected mean (4.6 years), and the type of test (two-tailed in this case). It returns the p-value, which represents the probability of obtaining a sample mean as extreme as the one observed, assuming the null hypothesis is true.

We compare the p-value to a predetermined significance level (e.g., α = 0.05) to determine if we reject or fail to reject the null hypothesis. If the p-value is less than α, we reject the null hypothesis and conclude that the average tenure is significantly different from 4.6 years. Otherwise, if the p-value is greater than α, we fail to reject the null hypothesis and conclude that there is not enough evidence to suggest a significant difference.

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The vertices of ΔA'B'C' can be found by multiplying the coordinates of the vertices of ΔABC by the scale factor of 3.

Therefore, if the coordinates of the vertices of ΔABC are (x₁,y₁), (x₂,y₂), then the coordinates of the vertices of ΔA'B'C' are  (3x₁,3y₁),  (3x₂,3y₂), and (3x₃,3y₃). This is because a dilation stretches or shrinks a shape by a factor, and the coordinates of the vertices are affected accordingly.

Step 1: Identify the coordinates of the vertices of ΔABC. Let's assume the vertices are A(x₁,y₁), B(x₂, y₂), and C(x₃, y₃).

Step 2: Multiply each coordinate by the scale factor of 3:
A'(3x₁,3y₁), B'(3x₂, 3y₂), and C'(3x₃, 3y₃).

Step 3: Write down the coordinates of the new vertices A', B', and C' after dilation.

The vertices of ΔA'B'C' are A'(3x₁,3y₁), B'(3x₂, 3y₂), and C'(3x₃, 3y₃).after dilating ΔABC by a scale factor of 3.    

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The solution to the given initial value problem, obtained using Laplace transforms, is y(x) = 0. This means that the function y(x) is identically zero for all values of x.

To find the solution of the initial value problem using Laplace transforms for the equation d²y/dx² + 9y = 9sin(t)u(t - 3), where y(0) = y'(0) = 0, we can follow these steps:

Take the Laplace transform of the given differential equation.

Applying the Laplace transform to the equation d²y/dx² + 9y = 9sin(t)u(t - 3), we get:

s²Y(s) - sy(0) - y'(0) + 9Y(s) = 9 * (1/s² + 1/(s² + 1))

Since y(0) = 0 and y'(0) = 0, the Laplace transform simplifies to:

s²Y(s) + 9Y(s) = 9 * (1/s² + 1/(s² + 1))

Solve for Y(s).

Combining like terms, we have:

Y(s) * (s² + 9) = 9 * (1/s² + 1/(s² + 1))

Multiply through by (s² + 1)(s² + 9) to get rid of the denominators:

Y(s) * (s⁴ + 10s² + 9) = 9 * (s² + 1)

Simplifying further, we have:

Y(s) * (s⁴ + 10s² + 9) = 9s² + 9

Divide both sides by (s⁴ + 10s² + 9) to solve for Y(s):

Y(s) = (9s² + 9)/(s⁴ + 10s² + 9)

Partial fraction decomposition.

To proceed, we need to decompose the right side of the equation using partial fraction decomposition:

Y(s) = (9s² + 9)/(s⁴ + 10s² + 9) = A/(s² + 1) + B/(s² + 9)

Multiplying through by (s⁴ + 10s² + 9), we have:

9s² + 9 = A(s² + 9) + B(s² + 1)

Equating the coefficients of like powers of s, we get:

9 = 9A + B

0 = A + B

Solving these equations, we find:

A = 0

B = 0

Therefore, the decomposition becomes:

Y(s) = 0/(s² + 1) + 0/(s² + 9)

Inverse Laplace transform.

Taking the inverse Laplace transform of the decomposed terms, we find:

L^(-1){Y(s)} = L^(-1){0/(s² + 1)} + L^(-1){0/(s² + 9)}

The inverse Laplace transform of 0/(s² + 1) is 0.

The inverse Laplace transform of 0/(s² + 9) is 0.

Combining these terms, we have:

Y(x) = 0 + 0

Therefore, the solution to the initial value problem is:

y(x) = 0

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The least number of miles she would have to drive per year to make leasing no more expensive than purchasing is 48500 miles.

Given:

She can lease a car for $420 per month (on an annual basis). Under this plan, the cost per mile (gas and oil) is $0.06. If she were to purchase the car, the fixed annual expense would be $4700, and other costs would amount to $0. 08 per mile.

Let x be the least miles.

420 * 12 + 0.06x < > 4700 + 0.08x

multiply by 100 on both sides.

504000+6x < > 470000+8x

97000 < > 2x

48500=x

Therefore the least number of miles she would have to drive per year to make leasing no more expensive than purchasing is 48500 miles.

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For Fund 1, the expected return is 5% with a standard deviation of 13.42%. For Fund 2, the expected return is 2% with a standard deviation of 24.66%. If risk-averse, Fund 1 is preferred.

To find the expected value and standard deviation of returns for Fund 1, we use the formula

Expected value = Σ(Probability of state of economy × Return for that state)

Standard deviation = sqrt[Σ(Probability of state of economy × (Return for that state - Expected value)^2)]

Expected value of Fund 1 = (0.2 × 20) + (0.5 × 10) + (0.3 × (-10)) = 5%

Standard deviation of Fund 1 = sqrt[(0.2 × (20-5)^2) + (0.5 × (10-5)^2) + (0.3 × (-10-5)^2)] = 13.42%

To find the expected value and standard deviation of returns for Fund 2, we use the same formula

Expected value of Fund 2 = (0.2 × 40) + (0.5 × 20) + (0.3 × (-40)) = 2%

Standard deviation of Fund 2 = sqrt[(0.2 × (40-2)^2) + (0.5 × (20-2)^2) + (0.3 × (-40-2)^2)] = 24.66%

If you are risk-averse, you would prefer a lower-risk investment with a lower standard deviation. Based on the standard deviations calculated above, Fund 1 is the lower-risk option, so you should pick Fund 1.

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Answer:

4*5 1/2,. 2/10.

Step-by-step explanation:

l think it's the answer

Answer:

I think

4*5 1/2

is correct

For a hypothesis testing by considering two samples related to rate of people who exercise and who do not exercise, the observed t-value < standard so, null hypothesis does not rejected and there is no evidence to support the claim.

We have a researcher who was interested in making a comparison of resting pulse rate of people who exercise regularly and who do not exercise regularly. There is two independent samples. In 1ˢᵗ sample, sample size, n₁= 16

Sample mean, \(\bar X_1\) = 72.3

Standard deviations, s₁ = 10.3

In case of second sample, sample size, n₂ = 12

Sample mean, \( \bar X_2\) = 69.0

Standard deviations, s₂ = 8.9

Level of significance = 2.5% = 0.25

Consider the null and alternative hypothesis for the test hypothesis are defined as \(H_0 : μ_1 =μ_2\)

\(H_a : μ_1 >μ_2\)

The test statistic : using t-test formula

\(t = \frac{ \bar X_1 - \bar X_2}{\sqrt{\frac{s_1^2}{n_1} +\frac{s_2^2}{n_2}}}\)

\(= \frac{72.3- 69}{ \sqrt{ \frac {10.3^2}{16} + \frac{8.9^2}{12}}}\)

= 0.91

Degree of freedom, df = n1 + n2 - 2

= 16 + 12 -2 = 26

Using the t-distribution table, the critical value for t(0.025, df = 26) is equals to the 2.06. Now, the observed t-value = 0.91 is less than 2.06 ( standard t value), so, we do not reject H₀ . Hence, no evidence to support the researcher claim.

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Answer:

x-intercept= 12

y-intercept=-4

Step-by-step explanation:

Answer:

60 cents

Step-by-step explanation:

The equation will be: the 40lb sugar candies worth 75 cents a pound added to 60lb (100-40) jelly beans worth x cents = 100 pounds worth 66 cents a pound

(.75 times 40)+(x times 60)= .66 times 100

30+60x=66

60x=36

x=.6

Meaning 60 cents

Answer:

60 cents

Step-by-step explanation:

;)

Answer:

1/2

Step-by-step explanation:

Answer:

Friction is a force between two surfaces that are sliding, or trying to slide, across each other.

Step-by-step explanation:

For example, when you try to push a book along the floor, friction makes this difficult.

Answer:

Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases.

Step-by-step explanation:

The slope from points (5, -7) and (6, -4) is 3.

The slope of a line represents the stiffness or direction of a line. It is also defined as the change in the y-coordinate with respect to the x-coordinate.

The slope of a line from the points (x₁, y₁) and (x₂, y₂) is given by

Here we have

Points (5, -7) and (6, -4)

As we slope of the line is [y₂ - y₁]/[x₂ - x₁]  

Take (5, -7) = (x₁, y₁) and (6, -4) = (x₂, y₂)    

Slope from given points = [-4 - (-7) ]/[6 - 5]    

= [-4 + 7) ]/[1]  = 3    

Therefore,

The slope from points (5, -7) and (6, -4) is 3.

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Pi is a Greek number that plagues mathematics, physics, and circles to the point where pi-fatigue is actually a thing. Pi is an infinite number, however it will henceforth only be written as 3.14159.

I have two solutions to your problem.

The first, and probably less appealing answer, but most used everywhere, would be to use a calculator.

But if you find yourself without a calculator at the ready, I hope you’re prepared to math quite dubiously.

Finding the square power, inverse of a radical, or whatever is multiplied by itself to equal 3.14159, is the second step. We must start someplace to start our attempt, and that place is 3.14159. Since 1 squared equals 1 and 2 squared equals 4, our result, expressed in decimal form, is larger than 1 but less than 2. After that, we just start divising and multiplying the decimals again until we have calculated the square root of pi.

TL;DR

1.7724531 is the approximate square root of pi.

Answer:

1.77245385091

Step-by-step explanation:

The gaming club at school is selling boxes of candy and drinks to earn a minimum of $500 to purchase new equipment. For each box of candy, they plan to charge $3.00, and for each drink, they plan to charge $2.00. The students' sales goal for the week is at least 80.

Let c and d represent the number of boxes of candy and drinks, respectively. 3c + 2d > 500 is the correct inequality that describes the situation. Let c represent the number of boxes of candy and d represent the number of drinks. The total revenue can be calculated by multiplying the number of boxes of candy sold (c) by the cost of each box of candy ($3) and the number of drinks sold (d) by the cost of each drink ($2).

Total revenue (R) = 3c + 2d. The students aim to earn at least $500 from their sales. The inequality that describes the situation is given by the equation:

3c + 2d ≥ 500

However, the question asks for an inequality and not an equation. Therefore, the correct inequality that describes the situation is:

3c + 2d > 500

This is because the total revenue should be greater than $500.

Thus, option (D) is the correct answer.

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The scale factor is found dividing one side length of the right triangle on the right by the equivalent side length on the right triangle on the left.

A dilation happens when the coordinates of the vertices of an image are multiplied by the scale factor, changing the side lengths of a figure.

For this problem, we have that the original and the dilated figures are given as follows:

Hence the scale factor is found dividing one side length of the right triangle on the right by the equivalent side length on the right triangle on the left.

The problem is incomplete, hence the general procedure to obtain the scale factor was presented.

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The statement "Suppose U and W are subspaces of V such that  \(V=U\bigoplus W\) and suppose also that {u₁, u₂, ....., uₘ} is a basis of U and {w₁, w₂, ......, wₙ} is a basis of W then {u₁, u₂, ....., uₘ, w₁, w₂, ......, wₙ} is a basis of v." is proved.

Given that, the operation is,

\(V=U\bigoplus W\)

So, V = U + W and U ∩ W = {0}.

Now since V = U + W so,

V = span {u₁, u₂, ....., uₘ, w₁, w₂, ......, wₙ}

We have to prove B = {u₁, u₂, ....., uₘ, w₁, w₂, ......, wₙ} is basis of V. So we have to prove that B is linearly independent.

a₁ u₁ + a₂ u₂ + ..... aₘ uₘ + b₁ w₁ + b₂ w₂ + ...... + bₙ wₙ = 0

a₁ u₁ + a₂ u₂ + ..... aₘ uₘ = (- b₁) w₁ + (- b₂) w₂ + ...... + (- bₙ) wₙ = v (let)

Now,

v = a₁ u₁ + a₂ u₂ + ..... aₘ uₘ ∈ U

v = (- b₁) w₁ + (- b₂) w₂ + ...... + (- bₙ) wₙ ∈ W

So, v ∈ U ∩ W = {0}

Therefore, v = 0

So, a₁ u₁ + a₂ u₂ + ..... aₘ uₘ

Therefore, a₁ = a₂ = ..... = aₘ = 0, since {u₁, u₂, ....., uₘ} is a basis of U so it is linearly independent.

Similarly, (- b₁) w₁ + (- b₂) w₂ + ...... + (- bₙ) wₙ = 0

So,  (- b₁) = (- b₂) = ...... = (- bₙ) = 0, since {w₁, w₂, ......, wₙ} is a basis of W so it is linearly independent.

Therefore, b₁ = b₂ = ...... = bₙ = 0

So, a₁ u₁ + a₂ u₂ + ..... aₘ uₘ + b₁ w₁ + b₂ w₂ + ...... + bₙ wₙ = 0 gives,

a₁ = a₂ = ..... = aₘ = b₁ = b₂ = ...... = bₙ = 0

So, B is linearly independent.

Hence,  {u₁, u₂, ....., uₘ, w₁, w₂, ......, wₙ} is basis of V.

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Answer:

2 = 1/2(-1) + 2

Step-by-step explanation:

You first substitute the letters for the numbers and then to find (b) or y intercept, you change x to 0 and solve for y. The y intercept is 2

So the equation would be 2 = 1/2(-1) + 2