Solve using the elimination method.x + y = -5x - y = -1
A. (-3, -2)
B. No solution
C. (-4, -1)
D. (3, -1)
Answer: A
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A truck must drop off furniture at 4 different homes (A, B, C, and D) as shown in the graph below, starting and ending at A. The numbers on the edges represent distances (in miles) between locations. The truck driver wants to minimize the total length of the trip.
The repetitive nearest-neighbor tour starting with vertex A is given by:
A. A, C, D, B, A. B. A, B, D, C, A. C. A, C, B, D, A. D. A, D, C, B, A. E. none of these
Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P < 0 (a loss is taken).
A. t > 0 B. 12 units < t < 17 units C. t < 12 units or t > 17 units D. t = 12 units or t = 17 units
Solve the problem.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 42 ft and the vertical clearance must be 21 ft at a point 18 ft from the center. Find an equation for the ellipse. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the equation.2k2 = 24k - 64
A. -8, 4 B. -8, - 4 C. 4, 8 D. 8, 16