Can somebody please help me I'm having trouble undersranding this

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72

1. 523.33 cubic inches

2. 113.04 cubic inches.

3. 17.41.

4. 16.49

i think this should be your answer

hope i

-lavira : )