queenlife55089 queenlife55089

22-09-2020
Mathematics

contestada

The average (arithmetic mean) of 10, 14, and 3x is 18. What is the value of x?

A) 25
B) 26
C) 27
D) 30

Respuesta :

22-09-2020

Mean=(10+14+3x)/(3)
Which mean value ady stated, 18
18=(10+14+3x)/(3)
54= (10+14+3x)
54-10-14=3x
3x=30
x=10

Hope this can help.

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diamon94 diamon94

22-09-2020

B

It is a great match question you go need to do 10x14+3x=18

Answer Link

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