please help me understand so i may help my daughter with her hw

Solve. x+y=15 xy=16 List the solutlonis). (T ype an ordered pair. Type an exact answer. using radicals as needed. Simplily your answer. Use a comma to separate answers as needed.) A graphics designer Is designing an advertising brochure for an art show. Each page of the brochure is rectangular with an area of 56 in2 and a perimeter dial} in. Find the dimensions of the brochure. The longer side is in. The shorter side Is In. (Type exact answers. using radicals as needed. Simplify your answers.) The area ofa rectangle is 5 m2. and the length of a diagonal is 2 n1. Find the length and the width of the rectangle. The longer side Is m. The shorter side is m. (rype exact answers, using radicals as needed.)