Kaleb earned 85, 95, 93, and 80 points on the 4 tests, each worth 100 points, given so far this term. How many points must he earn on his fifth test, also worth 100 points, to average 90 points for the 5 tests given this term? A.) 87 B.) 88 C.) 90 D.) 92 E.) 97 sum of terms
--------------------- = average number of terms 85 + 95 + 93 + 80 + x ---------------------------- = 90 {substituted x for missing score} 5 353 + x ---------- = 90 {combined like terms in numerator} 5 353 + x = 450 {multiplied each side by 450} x = 97 97 points must be earned on 5th testE.)- Algebra House
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