(8x^3+4x^2+x)-(2x^3+x^2+x)

step-by-step explanation:

answer: i believe its b. if you sound out the sentences that sounds wrong.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

0lz try yourself sorry for not answering