Question

A rectangle has length of 9x + 4 and a width of x − 5. find the perimeter and the area of the rectangle.

Answer 1

perimeter = 2 width + 2 length
= 2 (x-5) + 2 (9x+4)
= 2x-10+18x+8
= 20x-2
the area of the rectangle = width * length
= (x-5) * (9x+4)
= 9x^2 - 41x - 20