Question

HELP PLEASE!!!

Write an inequality and solve.

On the last three chemistry exams a student scored
81, 85, and 91. What score must the student earn on
the next exam to have an average above 85?

Answer 1

Explanation:

Let x be the next exam's score.

We have 81 + 85 + 91 + x > 4(85).

=> 257 + x > 340

=> x > 83

Therefore the student must score above 83.