For the equation in the form ax2 + bx + c = 0, determine the number of real solutions by examining the graph of 
x2 + 4x + 10 = 0
A. 3
B. 0
C. 2
D. 1
Answer: B
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Use the two steps for solving a linear programming problem to 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, 750 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. 5 P1 planes and 17 P2 planes
B.
| 9 P1 planes and 13 P2 planes |
C. 11 P1 planes and 7 P2 planes
D. 7 P1 planes and 11 P2 planes
Find the probability.An IRS auditor randomly selects 3 tax returns (without replacement) from 47 returns of which 11 contain errors. What is the probability that she selects none of those containing errors?
A. 0.0102 B. 0.4403 C. 0.4494 D. 0.0128
Determine the two equations necessary to graph the ellipse with a graphing calculator.
+ 
= 1
A. y = 
and y =- 
B. x = 
and x = -
C. y = 
and y = - 
D. x = 
and x = - 
Use the addition rule to solve the problem.A spinner has regions numbered 1 through 18. What is the probability that the spinner will stop on an even number or a multiple of 3?
A. 
B. 15
C. 1
D. 