Solve |x| + 7 < 4.

1. {x | x < -11 or x > -3}
2. {x | -3 < x < 3}
3. ø

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.