Word problems (algebra)?
1) The area of a rectangular book cover is 4x^2 - 6x - 40. The width of the book cover is 2x - 8. What is the length of the book cover?
2) The area of a rectangular parking lot is 2x^2 - 44x + 15. The width of the parking lot is 3x - 5. What is the length of the parking lot?
(Showing your work isn't necessary)
Comments
Recall that the area of a rectangle is found by the formula Area = length * width. In both cases, divide the area by the widths.
(4x² - 6x - 40) ÷ (2x - 8)
= 2x + 5 (length of book cover)
(2x² - 44x + 15) ÷ (3x - 5)
= have fun with long division!