a rectangle has a perimeter of 82 feet, and the lenght is 21 feet longer than width. Find its dimensions. Show your work PLEASE

Gabriel paints flower pots to sell at a craft fair. she paints 2/5 of a flower pot teal, 1/4 of it yellow, and the rest of it white. what fraction of the pot is painted either teal or yellow?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4