Consider a square with side length 2x + 10. If the perimeter is 160 cm. Find the area.

A catalog of scientific equipment states that the lens of a particular telescope has a circumference of 6.28 meters. What is the lens's radius? Use 3.14 for π.

4bc6 × 3b3 × 5c2

Consider an equilateral triangle with a height of 13ft. The area of this triangle of 79.95 ft2. What are the lengths of the sides?

Factor: mz-5mh² -5nz+25nh²

x²y ÷ xy

Factor: 12?2 − 75

Consider a circle that has a circumference of 28π centimeters (cm). What is the area, in cm2 of this circle?

(r4)3 ÷ (r3)2

Factor: 49?2 − 144