Help is appreciated greatly :)

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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.

Which number completes the inequality? 2/3 < _ < 7/9