Kelly pays 15% more each month in rent than Cici, and together they pay $1021.25 per month. How much does Cici pay per month?

$475

Step-by-step explanation:

Let the amount paid by Cici per month to be $ x

Kelly pays 15 % more , this will be 115/100 * x =$ 1.15x

The equation for the sum is :

$x + $ 1.15x = $1021.25

2.15 x = 1021.25

x = 1021.25 / 2.15

x = $475

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!