Solve for x
Is it A, B,C or D?

A makes the most sense, you would get rid of Y by multiplying it,it is the opposite of divison, this is because x is already almost by itself. the last step would be to get rid of Y. you would multiply Y to cancel it out on the right side and do the same to the left. this automatically gets rid of B and C,leaving A and D, but D doesnt have the R,so that gets rid of D, leaving A.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet