Question

Which of the following represents the area of a rectangle whose length is x – 7 and whose width is
x + 12?
Answer
a.x2 – 84
b.x2 + 5x – 84
c.x2 – 84x + 5s
d.x2 – 5x – 84

Answer 1

area=l*w
area=(x-7)(x+12)

Answer 2

should be D

Answer 3

foil it out...you get x^2 -12x + 7x -84

combine like terms you get x^2 -5x -84

Answer 4

b.x2 + 5x – 84