Write the system of linear equations represented by the augmented matrix. Then use back-substitution to find the solution. Use variables x, y, and z.
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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Use scientific notation to solve the problem.A computer can do one calculation in 1.4 x 10-7seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 x 1012 sec B. 1.4 x 106 sec C. 1.4 x 105 sec D. 1.4 x 10-7 sec
Mathematics
Solve the system by elimination.5 x - y = 114x + y = 16
A. (3, 4) B. (3, 5) C. (4, 3) D. No solution
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 5xy
)
B. 5xy
C. 5xy
D. 5xy
)
Mathematics
Evaluate.35
A. 15 B. 125 C. 729 D. 243
Mathematics