Question is in the image

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

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.

Anyone know these questions? i need ,.