Select TWO statements that can be represented by -40 feet. Group of answer choices

The length of a sailboat

The length of a sailboat

The length of a piece of ribbon

The change in altitude of a balloon

The distance of a tree branch above the ground

The distance of a fish below the surface of the water

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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hand, ambitous, ace, genius.