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X2 + y 2 = 36 x + y = 6 solve the system of equations.

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.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28