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3 years ago

COULD SOMEONE PLS HELP ME WITH MY LATEST 2 QUESTIONS?

Mathematics

1 answer:

OlgaM077 [116]3 years ago

4 0

I can try how do I help you ?

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Suppose the mean SAT verbal score is 525 with a standard deviation of 100, while the mean SAT math score is 575 with a standard

Ipatiy [6.2K]

Answer:

The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.

Step-by-step explanation:

Normal variables

Normal variables have mean $\mu$ and standard deviation $\sigma$

When we add normal variables, the combined mean is the sum of both means, and the standard deviation is the square root of the sum of both variances. The distribution is still normal.

In this question:

Verbal: $\mu_{V} = 525, \sigma_{V} = 100$ .

Math: $\mu_{M} = 575, \sigma_{M} = 100$

Combined:

$\mu = \mu_{V} + \mu_{M} = 525 + 575 = 1100$

$\sigma = \sqrt{\sigma_{V}^{2}+\sigma_{M}^{2}} = \sqrt{100^2 + 100^2} = 141$

The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.

6 0

3 years ago

Use the given scale factor and the side lengths of the scale drawing to

ahrayia [7]

Answer:

D for sure

Step-by-step explanation:

i dont know if you have time for this so i explain it in the comments if you need it

4 0

3 years ago

If you just write whatever just for the points i will report you.

Hoochie [10]

Answer:

Below!

Step-by-step explanation:

The best way to answer this question is to read the statement carefully.

=> Five less than twice a number = 2x - 5
=> Five times the sum of two numbers = 5(x + y)
=> The difference of 5 and a number, squared = (5 - x)²

Hoped this helped.

$BrainiacUser1357$

5 0

2 years ago

Read 2 more answers

The area of a square is 75 inches squared. A student correctly wrote the length of each side of the square as a√3. What is the v

aev [14]

Answer: 5 in.

Step-by-step explanation:

Given

The area of the square is $75\ in.^2$

The side length of the square is $a\sqrt{3}$

Area of square $=(\text{length})^2$

$\therefore 75=(a\sqrt{3})^2\\\Rightarrow 75=3a^2\\\Rightarrow a^2=25\\\Rightarrow a=5\ in.$

Thus, value of a is 5 inch

6 0

3 years ago

What's the power of a power

ahrayia [7]

The power of a number says how many times to use the number in a multiplication. It is written as a small number to the right and above the base number.

5 0

3 years ago