How do you find the percent change from 84 to 63?

25% Change

Step-by-step explanation: To find the percent change from 84 to 63, we will be using the "percent change" equation.

change = percent change x actual

To find the change subtract 63 from 84. 84 - 63 = 21. So the change is 21.

21 = percent change x actual

The actual is 84, because 84 is your original amount.

21 = percent change x 84  (Solve for p, percent change.)

21 = p x 84

21/84 = p

0.25 = p

Now, multiply the decimal 0.25 by 100 to get the percent change.

0.25 x 100 = 25, Or a 25% change.

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!