Angle 2 is an exterior angle because it is adjacent to the interior angle 1, and an exterior angle is equal to the sum of the measures of the two nonadjacent interior angles:
x+y+z=165 y=8/7x z=x+11 plug it in x+(8/7x)+(x+11)=165 2x+8/7x=154 22/7x=154 x=49 y=56 z=60 a skirt cost $49, a sweater cost $56, and a pair of shoes cost $60
