The perimeter of a triangular park is 16x+3. What is the missing length? What is the sum of the two given side lengths? The side lengths are 2x+5 and 5x-1.
What is 9x-1
500
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.
What is 25x^2(9-pi)
500
A school's rectangular athletic field currently has a length of 125 yards and a width of 75 yards. The school plans to expand both the length and the width of the fields by x yards. What polynomial in standard form represents the area of the expanded athletic field?