Please help! Is 2v+8.3+2v-6.1 equal to 4v+14.4 Is 18a+45 equal to 9(2a+5)
Is 3(a+1.5) equal to 3a+1.5

It's unclear what you are asking, so I solved it out. If you are wondering if the variables have an answer, all of them is no solution.

Step-by-step explanation:

2v+8.3+2v-6.1=4v+14.4

4v+14.4

18a+45=9(2a+5)

18a+45=18a+90

3(a+1.5)=3a+1.5

3a+4.5=3a+1.5

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!