SOLUTION: Dave earned the following test scores in his biology class: 82, 88, 92, and 93. How high does he have to score on the fifth test to have an average of 90 or more?

Algebra ->  College  -> Linear Algebra -> SOLUTION: Dave earned the following test scores in his biology class: 82, 88, 92, and 93. How high does he have to score on the fifth test to have an average of 90 or more?       Log On

 >= 90


82 + 88 + 92 + 93 + x >= 90*5 = 450


355 + x >= 450


x >= 450 - 355 = 95.


Answer.  x >= 95:   more than ot equal to 95.