Find the slope of the line, or state that the slope is undefined.
A. 2
B. - 
C. -2
D. 
Answer: D
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Determine whether the two pairs of numbers are proportional.12.56, 3.14 and 3.14, 0.785
A. Yes B. No
Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. How fast is the object accelerating when it is accelerating the fastest?
A. A cm/sec2
B. A2 cm/sec2
C. A
cm/sec2
D. 
cm/sec2
Combine the following, if possible.18
+ x
A. 18x
B. 19x2
C. 18x2
D. 19x
Solve the problem.An airline with two types of airplanes, P1 and P2, has contracted with a tour group to provide transportation for a minimum of 400 first class, 900 tourist class, and 1500 economy class passengers. For a certain trip, airplane P1 costs $10,000 to operate and can accommodate 20 first class, 50 tourist class, and 110 economy class passengers. Airplane P2 costs $8500 to operate and can accommodate 18 first class, 30 tourist class, and 44 economy class passengers. How many of each type of airplane should be used in order to minimize the operating cost?
A. 14 P1 planes and 7 P2 planes B. 13 P1 planes and 9 P2 planes C. 5 P1 planes and 22 P2 planes D. 9 P1 planes and 13 P2 planes