Determine whether the point (4,2) is in the solution set of the system of inequalities below. 4x + y < 2 y > –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.