Grayson evaluated 4x2 + 2y for x = 3 and y = 2. 4x2 + 2y = 4(3)2 + 2(2)
122 + 2(2)
144 + (4)
148
What error did Grayson make?

the answer to this question is 3/19

step-by-step explanation:

quit

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!