Greg is running a marathon. While running, he should drink 21 ounces of water per hour. If he runs for 3 hours, how much water should he drink?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Math each whole number with a rational, exponential expression

Hurry can a triangle can be constructed with angles measuring 115°,55°, and 20°? yes or no