The augmented matrix of a system of equations has been transformed to an equivalent matrix in row-echelon form. If the system is consistent, then give the solution. If it is not, then state that it is inconsistent.
A. (8, 3, 4, 0)
B. (8, 3, 4, 1)
C. (8, 3, 4, w)
D. Inconsistent
Answer: D
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Find the quadratic approximation of f at x = 0.f(x) = eln 10x
A. Q(x) = 1 + 10x + 50x2 B. Q(x) = 10x + 50x2 C. Q(x) = 10x - 50x2 D. Q(x) = 10x
Decide whether the problem is an equation or an expression.9(4x + 4) - 3(7x - 7)
A. Equation B. Expression
Use Pascal's triangle to expand the binomial.(x - 3y)6
A. x6 - 18x5y + 135x4y2 - 540x3y3 + 1215x2y4 - 1458xy5 + 729y6 B. x6 - 18x5y - 108x4y2 - 486x3y3 - 972x2y4 - 1458xy5 - 729y6 C. x6 - 18x5y + 36x4y2 - 54x3y3 + 36x2y4 - 18x y5 + 3y6 D. x6 - 18x5y - 729x4y2 - 60x3y3 - 729x2y4 - 18xy5 - 3y6
Solve the problem.Suppose a cost-benefit model is given by 
where C is the cost in thousands of dollars for removing p percent of a given pollutant. Find C(90) to the nearest dollar and interpret it.
A. $52,200; It will cost $52,200 to remove 90% of the pollutant. B. $5800; It will cost $5800 to remove 0.90% of the pollutant. C. $5220; It will cost $5220 to remove 0.90% of the pollutant. D. $9000; It will cost $9000 to remove 90% of the pollutant.