MATHEMATICS MIDDLE SCHOOL

The answer and how to solve this

Answers

Answer 1

Answer:

Multiply the number outside the parenthesis by each term inside the parenthesis:

2(v+5) = 2v + 10

Answer 2

Answer:

Answer:

start by adding the v and 5 then add multiply the two to get 10

Step-by-step explanation:

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There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is approximately normally distributed with mean 20.5 and standard deviation 4.9. The composite score on Exam B is approximately normally distributed with mean 1022 and standard deviation 214. Suppose you scored 27 on Exam A and 1209 on Exam B. Which exam did you score better on? Justify your reasoning using the normal model.

Answers

Answer: Exam A

Step-by-step explanation:

We must analyze how far are you from the mean in both cases, where the "step" that we will use to measure is the standard deviation.

In exam A, the mean is 20.5 and the standard deviation is 4.9.

If you scored a 27; then you need to see:

20.5 + 4.9 = 25.4

20.5 + 4.9 + 4.9 = 30.3

So you are within two times the standard deviation (more than the mean).

In the B exam, the mean is 1022 and the standard deviation is 214, where you scored 1209.

1022 + 214 = 1236

So in this exam, you are by one standard deviation away from the media.

With this, you can see that you did score better in exam A.

Given that 6x = 7y, find the ratio x:y.

Answers

$6x=7y\n x=(7)/(6)y\n (x)/(y)=(7)/(6)$

$6x=7y\ \ \ |both\ sides\ divided\ by\ (6y)\n\n(6x)/(6y)=(7y)/(6y)\n\n(x)/(y)=(7)/(6)\n\nAnswer:x:y=7:6$

How to simplify the square root of 49 over the square root of 4

Answers

multiply the √49 by √4 - this will give you √196 over 4
√196 = 14
therefore you have 14/4
divide each by 2 to simplify
this gives you 7/2 <-- your final answer

Square root of 49 divided by the square root of 4. The square root of 49 is seven, the square root of 4 is 2. So now, it looks like this: 7/2. Depending on how your teacher wants you to answer this, you would either leave it as 7/2 or simplify it further by dividing 7 by two, or making it into a mixed fraction. Hope this helps :)

The auditorium seated 375, but this was enough for only 30 percent of those who wanted a seat. How many wanted a seat but could not get one?

Answers

SO 375-30%

263

so only 263 could get a seat that mean 375-263=112 couldn't get a seat

The answer is im i did this question too before 12.5

can you find the cube root of a negative number? if so, is it positive or negative? explain your reasoning

Answers

yes you can and it is negative because if you think about it, the answer to the 3rd power is your original question, so for example, -8 would equal to the answer times itself 3 times
now ask yourself, does 2 times itself 3 times = to -8
or -2 times itself 3 times = to -8

Factor completely, then place the answer in the proper location on the grid
a^3-b^3

Answers

Answer:

$\displaystyle [a - b][a^2 + 2ab + b^2]$

Step-by-step explanation:

Use the DifferenceofCubes to factor this polynomial.

I am joyous to assist you anytime.

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