HELP as fast as possible plzz

-3.5u=-14

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.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

Factor the following expression completely 6x^11-24x^7