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?

Question

amistre64 · Answer

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

anonymous · Answer

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

amistre64 · Answer

good, so lets set that up

92+98+65+77+91+85 +x
------------------------- = 85
                    7

solve for x

anonymous · Answer

it's 87?

amistre64 · Answer

i get 87 ....

anonymous · Answer

Thanks