Solve the system by substitution. If the system is inconsistent or dependent, say so.y = xx = -y
A. infinite number of solutions of the equation y = x; dependent system
B. (0, 0)
C. (1, -1)
D. empty set solution; inconsistent system
Answer: B
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A. - 
B. - 
C. 
D. 
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Find a quadratic function to model the data, and use the model to predict the profit if 450 chairs are made.
A. Almost $44,000 B. Almost $42,000 C. Just under $45,000 D. Just over $40,000
Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.10x = 2.92
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Solve the problem.At SuperStop, gasoline costs 
per gallon when you pay with a credit card, 
per gallon less when you pay with cash. How much money will it cost to fill a 12-gallon tank if you pay with cash?
A. $17.04 B. $16.20 C. $16.94 D. $13.49