Question

FIRST TO ANSWER WILL BE MARKED BRAILIEST! WORTH 20 POINTS!

Answer 1

The score on the next test must be between 86 and 98, inclusive

Explanation:

Write an inequality using the average:

86 ≤
`(83+89+x)/(3)` ≤ 90

Solve for x:

multiply everything by 3:

258 ≤ x + 83 + 89 ≤ 270

258 ≤ x + 172 ≤ 270

subtract 172 from everything:

86 ≤ x ≤ 98

The score on the next test must be between 86 and 98, inclusive