1-Given the cost function C(x)=0.8x+43,120C(x)=0.8x+43,120 and the revenue function R(x)=1.78xR(x)=1.78x, find the break-even point.
2-Solve the following system of equations by graphing. 7x+2y=107x+2y=10 6x+2y=86x+2y=8
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