T. J. and Lindsey’s lunch cost $30. They want to leave a 20% tip for their waiter. Use the model below to determine the amount of the tip. Which amount is the closest to the amount of the tip that T. J. and Lindsey will leave for their waiter?

ddsf

step-by-step explanation:

dfs

hi there!

the answer will be d: 2

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!