Mark has $5. He buys six ping pong balls. When he gets home he has $2.15. How much did Mark spend?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?