peno211
27.03.2020 •
Mathematics
A student has gotten the following grades on his tests. what is the minimum grade he must get on the last test in order to have an average of 83? Grades: 89, 80, 87, 72
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Ответ:
answer
: a=2 b=7.5
step-by-step explanation:
use the scale factor and find out a b by dividing a/(1/2)