Repeating decimals are never sometimes or always rational numbers

Step-by-step explanation:

Also any decimal number that is repeating can be written in the form a/b with b not equal to zero so it is a rational number. Let me illustrate with an example. Hi there, Repeating decimals are considered rational numbers because they can be represented as a ratio of two integers.

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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

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mrb

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