The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(38, -19, 5)}
B. {(-17, 1, 5)}
C. {(5, -19, -29)}
D. ?
Answer: D
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Solve the problem.The sales of a new product (in items per month) can be approximated by 
, where t represents the number of months after the item first becomes available. Find the number of items sold per month 3 months after the item first becomes available.
A. 2325 items per month B. 4325 items per month C. 525 items per month D. 725 items per month
Write the trigonometric expression as an algebraic expression containing u and v.sin(tan-1 u + tan-1 v)
A. 
B. 
C. 
D. 
Solve the equation.1.3x + 3.3 = 0.8x - 0.35
A. {-8.03} B. {-7.3} C. {-7.4} D. {0.137}