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19.07.2019 •
Mathematics
Mark had 14 problems wrong on his test. his score was 72% correct. how many problems were on the test?
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Ответ:
If he got 14 wrong, then x - 14 is the number correct.
x - 14 = .72x
.28x - 14 = 0
.28x = 14
x = 50
The test consisted of 50 problems.
Ответ:
k
Step-by-step explanation: