Place these numbers in correct order and and simplify 25x^2 +6x^3 -7 +17 -24x^4 +6

Step 1:

We need to place the numbers in descending order of the power. Here, has the largest power, so that number goes first. We keep doing this until we end up with our final expression, placed in order based on the powers.

Step 2:

We can see that the last three numbers, 17, -7, and 6, don't have variables or powers, so we simplify by adding (and subtracting) them.

Our final equation:

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!