Question

So far this semester, Zachary has test scores of 92, 98, 65, 77, 91, and 85. He has one more test to take before the semester ends. What must he score on the last test to earn an average of 85 for the semester?

Answer 1

how do we find the average of a groups of numbers to begin with?

Answer 2

Add them al toghether, and then divide them by how many numbers there were.

Answer 3

good, so lets set that up

92+98+65+77+91+85 +x
------------------------- = 85
7

solve for x

Answer 4

it's 87?

Answer 5

i get 87 ....

Answer 6

Thanks