What is: x (80 - 75 x) - [500 + 2 (80 - 0.75 x)]- 250 - 3 (80 - .75x)

=−75x2+81.5x−1147.75

Step-by-step explanation:

simplify step-by-step.

x(80−75x)−(500+2(80−0.75x))−250−3(80−0.75)

Distribute:

=(x)(80)+(x)(−75x)+−500+(−2)(80)+(−2)(−0.75x)+−250+−3(80−0.75)

=80x+−75x2+−500+−160+1.5x+−250+−237.75

Combine Like Terms:

=80x+−75x2+−500+−160+1.5x+−250+−237.75

=(−75x2)+(80x+1.5x)+(−500+−160+−250+−237.75)

=−75x2+81.5x+−1147.75

where are the choices?

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: