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Nesterboy [21]
3 years ago
7

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
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