Answer:
you will have $37.92 left over and they can buy 19 pairs
Step-by-step explanation:
Use:
7,14,21,28,35,42,49,56,63,70,77,84
Because midpoints were used to make similar triangles we can say
AC=2(DE)
5x+12=2(9x-20)
5x+12=18x-40
-13x+12=-40
-13x=-52
x=4
AC=5x+12
AC=5(4)+12
AC=20+12
AC=32