PLZ HELP…..Are the following set of numbers a Pythagorean triple? 101,20,99

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Pick the description of a geometric object that best matches the real world object box for a deck of card

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y