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3 years ago

Which of the followibg expressions is equivalent to the expression a^2/3

Mathematics

1 answer:

Naily [24]3 years ago

4 0

Answer:

C. I can’t really enter square roots

Step-by-step explanation:

a^2/3 = a^2*a^1/3

Which is the cube root of a squared

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A classmate is 22 years younger than your instructor. Write an equation that will determine your classmate’s age (y) if given yo

Dima020 [189]

Hey there, we are given quite a lot of information in this problem. First of all, let's make an equation.

y = x - 22

where y = student's age

where x = instructor's age

this equation is correct because x(instructor) - 22 will yield the student's age (y).

If the instructor were 44 years old, the student would be 22 years old.

y = 44 - 22

y = 22

If the instructor were 66 years old, the student would be 44 years old.

y = 66 - 22

y = 44

3 0

3 years ago

Andy has $310 in his account. Each week, w, he withdraws $30 for his expenses. Which expression could be used if he wanted to fi

Furkat [3]

Answer:

310 - 3w

310 - 3(80) = $70

Step-by-step explanation:

310 - 30w

w = 8

310 - 30(8)

310 - 240

= 70

6 0

3 years ago

Read 2 more answers

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is inter

Rama09 [41]

Answer:

The administrator should sample 968 students.

Step-by-step explanation:

We have to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.88}{2} = 0.06$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a p-value of $1 - 0.06 = 0.94$ , so Z = 1.555.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation of 300.

This means that $n = 300$

If the administrator would like to limit the margin of error of the 88% confidence interval to 15 points, how many students should the administrator sample?

This is n for which M = 15. So

$M = z\frac{\sigma}{\sqrt{n}}$

$15 = 1.555\frac{300}{\sqrt{n}}$

$15\sqrt{n} = 300*1.555$

Dividing both sides by 15

$\sqrt{n} = 20*1.555$

$(\sqrt{n})^2 = (20*1.555)^2$

$n = 967.2$

Rounding up:

The administrator should sample 968 students.

5 0

3 years ago

Reflect (7,3) in (a) the x-axis and (b) the y axis

Monica [59]

Reflecting the x axis, we multiply the y value by -1, getting (7, -3)

Reflecting the y axis, we multiply the x value by -1, getting (-7, 3)

8 0

3 years ago

Which of the following is the correct factored form of the given equation?

svetoff [14.1K]

Answer: 3

Step-by-step explanation:

3 0

3 years ago

Which of the followibg expressions is equivalent to the expression a^2/3​

Which of the followibg expressions is equivalent to the expression a^2/3