Subtract 7x from both sides
3=9x-13-7x
simplify 9x-13-7x to 2x-13
3=2x-13
Add 13 to both sides
3+13=2x
simplify 3+13 to 16
16=2x
simplify both sides by 2
16/2=x
simplify16/2 to 8
x=8

3 0

3 years ago

The IQ test is designed such that the scores on it are normally distributed with a mean of 100 and a standard deviation of 15. I

kozerog [31]

Answer:

130

Step-by-step explanation:

A standard deviation is 15, so 2 standard deviation is 30, 2 standard deviations above 100 is 100+30=130

5 0

3 years ago

For which function is the domain

Anettt [7]

Answer:

D. $y=\sqrt{x}$

Step-by-step explanation:

A square root can't be evaluated if the number we want to find the square of is nagative.

3 0

3 years ago