Isaac currently has $200 in his savings account. he plans to deposit $20 each week.

which function represents the total amount of money he has saved. (s). as a function of the number of weeks, (w), since he had $200 in the account?

a. s (w) = 200+20w
b. s (w) =200w+20w
c. s (w) = 200-20w
d. s (w) = 20(w+ 200)

24

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!