The sum of the interior angles of each polygon is 360°. In the diagram DEFG SPQR. Find the values of x and y please help!!!

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0