What is the vertex form of the quadratic function that has a vertex at (3, 4) and goes through the point (4, 2)?

What is the solution to the inequality

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

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.