williamrobinson93
10.01.2022 •
Mathematics
Alan has scored 99, 85, and 74 on his previous three tests. What score does he need on his next test so that his average (mean) is 83?
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Ответ:
multiply both by 4
99+85+74+x= 332
258+x=332
subtract 258 both sides
x= 74
He must get a 74.
To check
99+85+74+74= 332
332/4 = 83
It’s right!
Hope it helps
Ответ:
i don't know\
Step-by-step explanation: