A researcher made the following graph shows the number of hours per week that people exercise versus the amount of money they spend eating out per week. Predict the approximate amount of money someone would spend eating out if they spend 3 hours per week exercising? A.)20
B.)60
C.)30
D.)40

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

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!

hard

step-by-step explanation: