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AysviL [449]
3 years ago
11

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

Mathematics
1 answer:
pshichka [43]3 years ago
7 0

Answer:

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

Step-by-step explanation:

Write an inequality using the average:

86 ≤ \frac{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

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