Perform the indicated operation.0.32(6x2 + 4x - 2) - (7.36x2 - 6x + 5.158)
A. -1.36x2 + 7.28x - 5.798
B. -5.44x2 - 2x - 5.798
C. -1.36x2 + 10x - 7.158
D. -5.44x2 + 7.28x - 5.798
Answer: D
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Solve the problem.It costs $400 to start up a business of selling hot dogs. Each hot dog costs 
to produce. Find the cost function C(x) = mx + b whose input is the number of hot dogs and whose output is the total cost.
A. C(x) = 55x + 400 B. C(x) = 400x + 0.55 C. C(x) = 0.55x + 400 D. C(x) = 0.55x - 400
Solve the problem.At a local grocery store the demand for ground beef is approximately 50 pounds per week when the price per pound is $4, but is only 40 pounds per week when the price rises to $5.50 per pound. Assuming a linear relationship between the demand x and the price per pound p, express the price as a function of demand. Use this model to predict the demand if the price rises to $5.80 per pound.
A. p = 0.15x + 11.5; 38 pounds B. p = 11.5x + -0.15; 40 pounds C. p = - 0.15x + 11.5; 38 pounds D. p = - 0.15x - 11.5; 40 pounds
Solve the problem.If a, b, and c are all nonzero, then determine if the plane ax + by + cz = 1 always intersects all three coordinate planes (i.e. the planes x = 0, y = 0, z = 0), sometimes intersects them, or never intersects them.
A. Never B. Always C. Sometimes
Simplify. Assume that all variables are nonnegative.
A. 2ab
B. 2ab2
C. 2ab
D. 2ab2