We have been given that the perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is , where represents the length of the rectangle and w represents the width of the rectangle.
Let us solve for .
Factor out 2:
Divide both sides by 2:
Subtract w from both sides:
Therefore, the expression represents length of rectangle.
We use the fact that x2+y2=1 This is the equation of the unit circle. We know that x=-4/5, so plug this in and solve for y x2+y2=1 <span>(−4/5)^2+y2=1</span> 16/25+y2=1 y2=1−16/25 y2=9/25 <span>y=−square root of 9/ 25</span> y = -3/5
