Select the two functions that are vertical stretches of the quadratic parent function. A. P(x) = -x
B. m(x) = -2x2
C. g(x) = 5x2
D. 9(x) = 0.3x2
E. h(x) = 4x2
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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!

3100

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