The proof that δqpt ≅ δqrt is shown.

given: sp ≅ sr
prove: δqpt ≅ δqrt

triangle p q r is shown. angle p q r is cut by a perpendicular bisector to form midpoint t on side p r. point s is on line q s. lines are drawn from points p and r to point s. line segments p s and s r are congruent.

what is the missing reason in the proof?

you forgot an image

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!

answer: the answer is d