Solve the equation.
= 3
A. 
B. 
C. {18}
D. {6}
Answer: B
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Evaluate the expression for the given values of the variables, if possible.-x + y ? 2, for x = 1, y = 9
A. 9 B. 19 C. 18 D. 17
Solve the equation analytically.
x - 
x = 3
A. {90} B. {-45} C. {-90} D. {45}
Solve the problem.The profit (in thousands of dollars) that a company earns from producing x tons of brass and y tons of steel can be approximated by 
Find the amount of brass and steel that maximize profit and find the value of the maximum profit.
A. 
tons of brass and 
tons of steel; maximum profit is $157,977
B. 3 tons of brass and 6 tons of steel; maximum profit is $216,000
C. 
tons of brass and 
tons of steel; maximum profit is $118,833
D. 6 tons of brass and 3 tons of steel; maximum profit is $216,000
Subtract.7158
A. 6304 B. 5304 C. 5296 D. 5196