Question

Steve has these scores on the exams for this semester: 89, 92, and 87. What score will he have to get on the fourth exam to have a final average of at least 90%?

Answer 1

average is all the values added divided by the number of values that you added.

\[\frac{89+92+87+x}{4}=90\]

Answer 2

All you have to do is solve for x which is the last test you have to take.