Answer:
11
Step-by-step explanation:
The mean is calculated as
mean = 
let the third number be x , then
= 15 ( multiply both sides by 3 to clear the fraction )
34 + x = 45 ( subtract 34 from both sides )
x = 11 ← third number
It's very easy... just do 36/4.
36/4= 9.
I tried to show all work.
Answer:what are the solution to the equation 0=X^2-X-6? Select two options
Step-by-step explanation:A and D