pampam49
15.08.2021 •
Mathematics
The mean of 3 numbers is 7.two numbers are 4 and -5
Find the third number
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Ответ:
Step-by-step explanation:
(-5+4+x)÷3=7
-5+4+x=21
x=21-4+5
x=22
Ответ:
4.5/3 =1.5
1.5+1.5+1.5 = 4.5