Find the product of each sum and difference.
(21+9)(21-9)

Describe all the numbers that when rounded to the nearest thousand are 645,000

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.