Question

Can anyone help me with this one, Next one.......

Answer 1

m + 7

Explanation:

`x = (m + 9)/(2)\\ \\y = (2m + 15)/(2)\\\\z = (3m + 18)/(2)\\\\To\;\;find\;\;\\(x+y+z)/(3) \\\\= (1)/(3) *[(m + 9)/(2)+(2m + 15)/(2)+(3m + 18)/(2)]\\\\= (6m + 42)/(6)\\ \\= m + 7`

Answer 2

B) m + 7

Explanation:

x + y + z = (m+9)/2 + (2m+15)/2 + (3m+18)/2 = (6m + 42)/2 = 3m + 21

Average of x, y, and z = (x + y + z)/3 = (3m + 21)/3 = m + 7