Melinda leaves her house and drives to the library. She travels ___ miles.

Next, she leaves the library and goes to the store. She travels
__ miles.

When she is done at the store, she heads back to her house. If the distance from the store to her house is 15.6 miles, then she will have traveled ___
miles total.

step-by-step explanation:

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!