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\fSolve each system using substitution or additions (elimination). -3x + y = 2 12x - 4y- = -8Solve each system using substitution or additions (elimination). -x + 2y = -1 5x - 10y = 6\fWhen graphing an inequality, explain why we only need to test one point to determine whether an entire region is the solution? A musician charges C (at) : 6431: l 20, 000 ,where a": is the total number of attendees at the concert. The venue charges $80 per ticket. After how many people buy tickets does the venue break even, and what is the value of the total tickets sold at that point? A cell phone factory has a cost of production C (3:) = 1503: | 10, 000 and a revenue function R013) 2 20033. What is the breakeven point? /(5 pts) A laptop company has discovered their daily cost and revenue functions: C (a) = 3x2 - 10x + 200 and R(a) = -2x2 + 100x + 50 . If they want to make a profit, what is the rang of laptops per day that they should produce? Round to the nearest number which would generate profit