Question

Brian scored 92, 87 and 88 on three science tests. Write and solve an equation to find the score Brian will need on the fourth science test so that the mean test score is 90.

Answer 1

You would need to score a 93% to have an average of 90.

Explanation:

Well, to check my work you would need to find the average.

So, 93 + 92 + 88 + 87 = 360. Then you divide by four; 360 / 4 = 90. ^^