Josh has a test everyday for 5 days. He gets the scores 87%, 92%, 63%, 79%, and x. Please explain in full detail.

a. What is his average score for the first 4 days.

b. What should his score be, if he wants to have an average of 85%

a. 80.25

b. 104

Step-by-step explanation:

For (a), you add all the numbers together and divide by 4 because there are 4 test scores.

87 + 92 + 63 + 79 ÷ 5 = 80.25

For (b), we need to set up an equation. It is going to be a similar concept.

87 + 92 + 63 + 79 + x ÷ 5 = 85

x = 104

Hope this helps!

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )