Math
posted by Rana .
1.) Solve the system by graphing. You may use paper or a calculator.
2x  y = 8
x + 3y = 11
2.) The revenue for a certain brand of toothpaste is y = 2.5x where 'x' is the number of tubes of toothpaste sold and 'y' is the total income for selling 'x' tubes. The cost equation is y = 0.9x + 3000, where 'x' is the number of tubes manufactured and 'y' is the cost of producing 'x' tubes. Find the value of 'x' where the company breaks even.
x=?
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