Solve the system of linear equations.
A. (-6, 2, 11)
B. (7, 12, 11)
C. no solution
D. (7, 2, -2)
Answer: D
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Sketch the level curve z = k for the indicated values of k.z = x2 + y2, k = 0, 2, 4, 6, 8
A. 
B. 
C. 
D. 
Solve the problem.A cereal factory has weekly fixed costs of $33,000. It costs $1.12 to produce each box of cereal. A box of cereal sells for $4.16. Express the profit function p(x) that gives the total weekly profit from x boxes of cereal.
A. p(x) = 3.04x B. p(x) = 3.04x - 33,000 C. p(x) = 3.04 + 33,000x D. p(x) = 4.16x - 33,000
Solve the problem.The forearm length in centimeters, A, can be approximated by a linear function of the foot length in centimeters, f. Use the points (25, 24) and (33, 33) to find a linear model for the data in the table below. 
A. A = f - 1 B. A = 1.125f + 4.125 C. A = 0.889f + 1.775 D. A = 1.125f - 4.125
Find the derivative.f(x) = ex + ln ?x?
A. ex + eln ?x?
B. ex(1 + 
)
C. ex(x + 1)
D. ex + ln ?x?