I need help with this multiple choice question I would really appreciate it if you help!

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Step-by-step explanation:

C. not a rational number

B

Step-by-step explanation:

it is not a rational number because denominator of any rational number is never zero

1 3 5

step-by-step explanation:

i took the test: )

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!