3. Dara went on vacation to New York City in 2012. She bought a $20 pass to ride
the subway. Each time she rode the
subway it cost her $2.25. If she rode the
subway 7 times, how much money was
left on her pass at the end of her trip?
A $2.25
C $8.50
B $4.25
D$15 75

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!

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step-by-step explanation:

step-by-step explanation:

no solution.