Problema Solution
A 9 square ft painting is mounted with border on a square frame. If the total area of the border os 3.25 square ft, what is the length of a side of a frame?
Answer provided by our tutors
let
a = the length of a side of a frame, a>0
the area of the frame is a^2 and is equal to the sum of the area of the painting and the border area
a^2 = 9 + 3.25
by solving we find
a = 3.5 ft
click here to see the step by step solution of the quadratic equation
the length of a side of a frame is 3.5 ft.