Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.
A. x = 4, y = -2
B. x = -4, y = 2
C. x = 2, y = -4
D. x = 2, y = 4
E. no solution
Answer: B
Mathematics
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Change the number to polar form and then perform the indicated operations. Express the result in rectangular form.
A. 
+ 
j
B. 
- 
j
C. 
- 
j
D. 
- 
j
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Use transformations of the graph of y = x4 or y = x5 to graph the function.f(x) = x4 + 4 
A. 
B. 
C. 
D. 
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Simplify. Assume that all variables represent nonnegative numbers.
A. t14
B. t7
C. t2
D. t
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Use the following information to fill in the blank: 
87 T = ___ tsp
A. 435 B. 261 C. 29 D. 17.4
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