Kal is decorating the outside edge of a square bulletin board. He needs to know the side length of the bulletin board. The area of the bulletin board is n square feet. Which expression shows the side length, in feet, of the bulletin board?

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?