A take-and-bake pizza chain has several
coupons, which cannot be used together.
J. D. is buying a pizza that costs $17.90.
Should he use a $5 off coupon or a 35% off
coupon? (Example 2)

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.