Eon states that 21, 28, 35 is a pythagorean triple because the lengths found in step 2 form a pythagorean triple. which explains whether or not leon is correct?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?