Solve the system of equations by the elimination method. Check your solutions. For any dependent equations, write your answer in the ordered pair form.
A. {(7, 1)}
B. {(6, 1)}
C. ?
D. {(7, 0)}
Answer: D
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Find T, N, and B for the given space curve.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. T = 
i + 
j + 
k; N = 
i + 
j; B = 
i + 
j + 
k
B. T = 
i - 
j + 
k; N = 
i + 
j ; B = - 
i + 
j + 
k
C. T = 
i - 
j + 
k; N = 
i + 
j; B = - 
i + 
j + 
k
D. T = 
i - 
j + 
k; N = 
i + 
j; B = - 
i + 
j + 
k
Simplify the rational expression.
A. 
B. -1
C. -x
D. 1
Solve the problem.Last year, Maria earned $336 per week. This year, her salary increased to 
per week. What is the percent of increase?
A.
| 92.8% |
B.
| 7.2% |
C. 7.7%
D.
| 92.3% |
Solve the problem.A deep-sea diver dives from the surface to 141 feet below the surface. She then dives down 16 more feet. Find the diver's depth.
A. 160 feet below the surface B. 157 feet below the surface C. 123 feet below the surface D. 125 feet below the surface