The area of a parallelogram in which b = (3x + 5) ft and h = (7x - 1) ft

The area of a parallelogram is equal to the base multiplied by the height. So in this instance it would be (3x+5) * (7x-1). Foil out the binomials. 21x^2+35x-3x-5 Combine like terms. 21x^2+32x-5

The area is 21x^2+32x-5