The scores of James in his math test are 75, 78, 89, and 71. What score on the next test will make James’ average at least 80 ? x > 87 x > 87 x < 87 x < 87

Question

asked Apr 18, 2022 172k views

2 Answers

Yanis Boucherit · Answer 1 · 2022-04-21T08:42:00+0000

Answer: x ≥ 87

Explanation:

Set the minimum score on the next test as x & calculate it:

$(75+78+89+71+x)/(5) =80\\\\75+78+89+71+x=80(5)\\\\313+x=400\\\\x=400-313=87$

So they need at least a score of 87 for the average to be 80+.