Leo wants to paint a mural that covers a wall with an area of 400 square feet. they height of the wall is 1/4 of its length. what is the length and the height of the wall? so, the dimensions (length by height) of the wall are feet by feet.

Cesar bought 7 items at the candy store. he bought candy bars for $0.50 each and packs of gum for $0.95 each. he spent a total of $6.80. what system represents the solution for the number of candy bars (x) and the number of pack gum (y) purchased?