Answer:
B. m+7
Step-by-step explanation:
Given, x=2m+9
y=22m+15
z=23m+18
Average of x,y,z=32m+9+22m+15+23m+18=326m+42=m+7
#LetsStudy
B) m + 7
Why? Here's my solution/formula for you:
x = 2m + 9
y = 22m + 15
z = 23m + 18
32m + 9 + 22m + 15 + 23m + 18 = 326m + 42 = m+7
[tex]\tiny\tt{-KimmyVarxa}[/tex]
