About which line should the rectangle A'B'C'D' be reflected in order to get to the rectangle ABCD

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!

it would open into a square depending on the type of envelope i’m not sure about the second part

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation: