Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the variables. Then use back-substitution to find the solution.
A. {(0, 
, -5)}
B. {(
, 14, -4)}
C. {(
, 8, -4)}
D. {(- 
, 14, -4)}
Answer: D
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Find the triple scalar product (u x v) ? w of the given vectors.u = 4i + 2j - k; v = 1i + 5j - 3k; w = 5i + 3j - 6k
A. -44 B. -52 C. -142 D. -80
The aging schedule of a firm shows that 40 percent of the receivables are collected in 18 days and the remaining 60 percent of the receivables are collected in 50 days. As a result, the firm's days sales outstanding (DSO) is _____.
A. 34.0 days B. 30.8 days C. 40.8 days D. 42.0 days E. 37.2 days
Perform the indicated operation and simplify.
- 
A. 
B. 7x + 62
C. 
D. 
Use set-builder notation to write the set.The set of all multiples of 3 greater than 15 and less than 31
A. {x 
is a multiple of 3 that is greater than 15 and less than 31}
B. {x 
= 3n, n is a whole number}
C. {15, 18, 21, 24, 27, 30}
D. {18, 21, 24, 27, 30}