Problema Solution
On his last three tests, Logan scored a 93%, 70%, and 88%. If he wants his test average to be a 90% or higher, what does he need to score on the fourth test.
Answer provided by our tutors
let 'x' represent the core on the forth test
(93 + 70 + 88 + x)/4 >= 90
by solving we find:
x >= 109
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he needs to score 109% or higher on the forth test.