*i already got the answer just want to make sure im correct * devonte's scores on his first four spanish tests are 92,85,90,and 92. what test score must devonte earn on the fifth test so that the mean will be exactly 90? *i think the answer is 91*

Note that the fifth test = x

There are 5 tests, and the mean will be 90

" (92 + 85 + 90 + 92 + x)/5 = 90 " is your equation

Simplify

(359 + x)/5 = 90

Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

(359 + x)/5 (5) = 90(5)

359 + x = 450

Isolate the x. subtract 359 from both sides

x + 359 (-359) = 450 (-359)

x = 450 - 359

x = 91

91

hope this helps