If ∠A is a complementary angle of ∠B and ∠C is a complementary angle of ∠B, then which of the following statements is true? Question 9 options:

A)

∠A + ∠C ≅ ∠B

B)

∠A ≅ ∠B

C)

∠A ≅ ∠C

D)

∠B ≅ ∠C

take it another

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!