Question

Someone Help! PLEASE!

Jesse is taking the tests needed to join the math team. His scores were 89, 92, 94. What's the lowest score he can get on the fourth test and still have a 90 average?

Answer 1

The lowest score could be 85

Explanation:

Let the lowest score = x

(x + 89 + 92 + 94)/4 = 90 Add the 3 scores you know

(x + 275)/4 = 90 Multiply both sides by 4

(x + 275) = 360 Remove the brackets.

x + 275 = 360 Subtract 275

x = 360 - 275

x = 85