What is the perimeter of a trapezoid in centimeters

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?