Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score
does he need on his next test to raise his average to 85?
Question
Question
Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score
does he need on his next test to raise his average to 85?
Answer:
92
Step-by-step explanation:
(74 + 90 + 84 + 92) / 4 = 85
Answer:
x ≥ 92
Step-by-step explanation:
let ‘x’ = necessary score
(74 + 90 + 84 + x) / 4 ≥ 85
(248 + x) / 4 ≥ 85
cross-multiply:
248 + x ≥ 340
x ≥ 92