Question

If the average (arithmetic mean) of x, y, and z is y, what is x+z in terms of y?

A. 2y
B. (3/2)y
C. y
D y/2
E. y/3

Answer 1

what have you tried so far?

Answer 2

do you know how to find the average of 3 numbers?

Answer 3

I tried writing out the problem, yea you add all the numbers and divide by three

Answer 4

when you add letters, it's easy: write them down and put a + in between them

to divide this by 3, draw a long line underneath it, and put a 3

Answer 5

and then what do i do?

Answer 6

you set that equal to the "mean" which they tell you is "y"

can you write it down? (don't try solving , just write it down)

Answer 7

ok done

Answer 8

can you write it here?

Answer 9

xyz/3=3 Kappa

Answer 10

= y Kappa

Answer 11

ok i will