Your friend has y dollars. you have half as much money as he does. which expression represents the amount of money you have?

y / 2

Y is your friend's money and if you have half as much as he does, you can divide y by 2 to get the amount of money you have.

So, the answer is y / 2

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150