(7x4 + 11x3 – x2 – 8x + 6) – (-12x4 + 9x2 – 15) a) -5x4 + 11x3 + 8x2 – 8x – 9 b) 19x4 + 11x3 – 10x2 – 8x + 21 c) 5x4 + 2x3 + 14x2 – 8x + 6 d) -19x4 – 2x3 – 8x2 – x + 9 e) -19x4 – 2x3 – 8x2 – x – 9

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2