Question

The length of a rectangle is 3 cm more than 10 times its width. The area of the rectangle is 75 cm2. A quadratic function can be used to represent the dimensions of the rectangle. What quantity of the rectangle represents the domain of that function?

Answer 1

Let w =the width. The length=10w+3. The area is given by length times width.
\[A=(10w+3)w=10w^2+3w=75\]