Determine whether the test point is a solution to the linear inequality.(-5, 2), -x - 3y ? -1
A. Yes
B. No
Answer: A
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Solve the system by substitution or elimination. If a system is inconsistent or has dependent equations, say so.y = - 
x-5x - 7y = 1
A. 
B. ?; inconsistent system
C. 
D. 
Find the x-intercepts (if any) for the graph of the quadratic function.f(x) = x2 - 4
A. (2, 0) B. No x-intercepts C. (-2, 0) and (2, 0) D. (-4, 0)
Solve the problem.In a manufacturing operation, the cost, c, is related to the manufacturing time, t, by the equation c = 
.Find the exact value of c when t = 200. Do not concern yourself with units.
A. 14
B. 200
C. 20
D. 10
Solve the problem.Suppose that the labor cost for a building is approximated by 
where x is the number of days of skilled labor and y is the number of days of semiskilled labor required. Find the x and y that minimize cost C.
A. x = 24, y = 60 B. x = 40, y = 40 C. x = 20, y = 24 D. x = 20, y = 20