Add. Write your answer in standard form. (4x5+2x2−3x−5) +(−2x2+6x7−5x+2) 4x5+6x7−4x2−8x−34 x to the 5th power plus 6 x to the 7th power minus 4 x squared minus 8 x minus 3

2x3+8x9−8x−32 x cubed plus 8 x to the 9th power minus 8 x minus 3

6x7+4x5−8x−36 x to the 7th power plus 4 x to the 5th power minus 8 x minus 3

4x5+6x7−8x−34 x to the 5th power plus 6 x to the 7th power minus 8 x minus 3

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

it is true

step-by-step explanation:

all the combinations add up i used   calculator

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!