Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
z = 8x + 9y. Find minimum.
A. minimum: 50
B. minimum: 61
C. minimum: 51
D. no minimum
Answer: A
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Solve the problem.Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $7500 in 2007 and $56,500 in 2012. Let x = 0 represent 2007. Find the equation giving yearly sales y.
A. S(x) = 9800x + 56,500 B. S(x) = 49,000x + 7500 C. S(x) = 49,000x + 56,500 D. S(x) = 9800x + 7500
Solve.4x - 10 ? 26
A. x ? -9 B. x ? 9 C. x ? -9 D. x ? 9
The figure shows the graphs of the cost and revenue functions for a company that manufactures and sells binoculars. Use the information in the figure to answer the question.
Use the revenue and cost functions to write the profit function from producing and selling x binoculars.
A. P(x) = 2x + 1500 B. P(x) = 4x + 1500 C. P(x) = 4x - 1500 D. P(x) = 2x - 1500
Find an equation for the parabola described.Vertex at (4, 6); focus at (7, 6)
A. x = 
t2 + 4, y = t + 6
B. x = 
t2 - 4, y = t - 6
C. x = 
t2 + 4, y = t + 6
D. x = - 
t2 + 4, y = t + 6