Find the value of x.

70

Step-by-step explanation:

x + 35 = 105

x = 105 - 35

x = 70

x = 70°

Hope that this helps you...

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: i dont know but if you try hard you will get it right : )

step-by-step explanation: