What is the product of 7x - 4 and 8x + 5?
A. 15x + 1
B. 30x + 2
C. 56x2 + 3x - 20
D. 56x2 – 3x + 20

Acontractor needs 54 square feet of brick to construct a rectangular walkway. the length of the walkway is 15 feet more than the width. write an equation that could be used to determine the dimensions of the walkway. solve this equation to find the length and width, in feet, of the walkway.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π