What is 3x(4x - 5) when it is expanded?

Me answer number 3plz explain how you do it

What is the value of x in the following equation? -3x-2=2x+8

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.