"If an integer n is odd, then n+1 must be even."

Yes .An integer n is odd if and only if n + 1 is even.

Step-by-step explanation:

Proof.

We first prove ( =⇒ ). n +1=2k +1+1 = 2k + 2 = 2(k + 1).

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: a) 56% women

b)44% men

step-by-step explanation: