Which of the following is true? A) The girls are taller on average
B) The boys are taller on average

b I think bc ik that most girls grow faster than boys and might be typically taller than them until the boys grow and then somehow get taller than girls

B) The boys are taller on average

2

step-by-step explanation:

vvvvv

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!