Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: D
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Factor by grouping.20x2 - 16x - 15x + 12
A. (20x - 3)(x - 4) B. (20x + 3)(x + 4) C. (4x + 3)(5x + 4) D. (4x - 3)(5x - 4)
The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds). s (m)
When is the body moving backward?
A. 2 < t < 3, 4 < t < 5, 7 < t < 9 B. 8 < t ? 10 C. 2 < t < 3, 4 < t < 5, 7 < t < 8 D. 8 < t < 9
Sketch the graph of the function f and evaluate 
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 nearest-neighbor tour starting with vertex A is given by:
A. A, B, C, D, A. B. A, C, B, D, A. C. A, B, D, C, A. D. A, D, C, B, A. E. none of these