SOLUTION: Lucy scored a 85, 64 and 76 On her math exams . What score must Lucy obtain on the next math test to have an average of exactly 80? A)93 B) 97 C)94 D)95

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: Lucy scored a 85, 64 and 76 On her math exams . What score must Lucy obtain on the next math test to have an average of exactly 80? A)93 B) 97 C)94 D)95      Log On

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Question 1143001: Lucy scored a 85, 64 and 76 On her math exams . What score must Lucy obtain on the next math test to have an average of exactly 80?
A)93
B) 97
C)94
D)95
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!

(85+64+76+x)/4 = 80

Solve for x:
(225+x) = 320
x = 320-225
x = 95

Lucy must score a +highlight%28+95++%29+ on the next math test in order to have an average of 80