Simplify. Unless otherwise specified, assume that variables can represent any number.
A. 13
B. -13
C. 169
D. Not a real number
Answer: A
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Use the theorem that relates the sum of degrees to the number of edges to determine the number of edges in the graph.A graph with 7 vertices, one of degree 6 and six of degree 1.
A. 7 edges B. 13 edges C. 14 edges D. 6 edges
Solve the problem.The index of refraction for air, Ia, is 1.0003. The index of refraction for water, Iw, is 1.3. If 
and 
find W to the nearest tenth.
A. 23.7° B. 21.7° C. 22.7° D. 20.7°
Solve the triangle, if possible. Approximate values to the nearest tenth when appropriate.? = 77.2°, b = 3.81, a = 24.0
A. ? = 39.6°, ? = 64.2°, c = 31.8 B. ? = 37.6°, ? = 64.2°, c = 29.8 C. ? = 38.6°, ? = 64.2°, c = 27.8 D. No solution
Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 40 mi B. 20 mi C. 6.3 mi D. 10 mi