Look at the expression below. Decide which ones are equivalent and justify how you know or show your thinking. Expression and ___ are equivalent because a) 4x + 2 + x
b) 7x
c) 5x + 2
d) 6x + x

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

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!

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.