How do i work out question 4:

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

What is the solution set of the quadratic inequality x^2-5< or equal to 0

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.