A woman bought some large frames for $13 each and some small frames for $7 each at a closeout sale. If she bought 12 frames for $108, find how many of each type she bought. She bought _
large frames.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.