Simplify the expression.
(-0.75x - 5)-(3.5x + 7.4)
The simplified expression is

-4.25x - 12.4

Step-by-step explanation:

(-0.75x - 5)-(3.5x + 7.4)

Remove parenthesis first

0.75x - 5 -  (3.5x + 7.4)

Then -(3.5x + 7.4):   -3.5x - 7.4

-0.75 - 5 - 3.5x -7.4

Now simplify -0.75x - 5 - 3.5x - 7.4 which is -4.25x - 12.4

Then you get the answer aka -4.25x - 12.4

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!