A voice coach charges $165 for 1.5 hours of work. Which proportion can be used to find x, the number of dollars the voice coach charges for 4 hours of work
The proportion that can be used to find x is:
165 / 1.5 = x / 4
Solving for x:
x = (165 * 4) / 1.5
x = 660 / 1.5
x = $440
Therefore, the voice coach charges $440 for 4 hours of work.