Natasha wants to average at least 90% in math class. Her test scores so far are 94%, 89%, 88%, 92% and 85%. What score does she need on her next test to reach her goal?
Let's set up the problem
Start with an inequality~
(94+89+88+92+85+x) / 6 ≥ 90
448 + x ≥ 540
x ≥ 92
~
