Which method should be used to solve the system? Explain your answer, including a description of the first step.-9x2 + 8y2 =36x - 6y =-7
What will be an ideal response?
Substitution should be used, because using elimination would mean introducing an xy term into the second equation unnecessarily. The second equation should be solved for x.
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Solve the problem.The map shows the states New Mexico, Oklahoma, Texas, Arkansas, and Louisiana. Find a route that starts in Arkansas and crosses each common state border exactly one time.
A. AR ? OK ? NM ? TX ? AR ? LA ? TX ? OK B. AR ? TX ? NM ? OK ? TX ? LA C. AR ? LA? TX ? NM ? OK ? AR D. No such route exists.
Solve the problem.Evaluate 
at (x, y, z) = (1, 2, 0) for the function u(p, q, r) = epq cos(r); p = 
, 
A. 0
B. 1
C. 
D. 2
Solve the problem.The volume of wood, V, obtained from a tree varies jointly as the height, h, and the square of the girth (the distance around the tree trunk), g. If the volume is 38.4 ft3 when the height is 30 ft and the girth is 
what is the volume when the height is 40 ft and the girth is 6 ft?
A. 110.96 ft3 B. 117.55 ft3 C. 115.2 ft3 D. 118.2 ft3
Write the number in scientific notation.57 × 104
A. 0.57 × 104 B. 5.7 × 104 C. 5.7 × 103 D. 5.7 × 105