Find fx.f(x, y) = 
A. 7x6
B. 
C. 
D. 
Answer: B
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Use the formula for an to find the general term for the arithmetic sequence.2, -2, -6, . . .
A. an = -4n + 6 B. an = 2n - 4 C. an = n - 4 D. an = 6n - 4
Provide an appropriate response.For a certain system of three linear equations, the solution set is 
and 
Find the values of Dx, Dy, and Dz.
A. Dx = 120; Dy = -45; Dz = 90
B. Dx = -45; Dy = 120; Dz = 90
C. Dx = 
; Dy = - 5; Dz = 
D. Dx = -8; Dy = 3; Dz = -6
Solve the problem.A repair company's charge for repairing a certain type of copy machine fits the model 
where y is the amount charged in dollars and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $120? (Round to the nearest minute.)
A. 187 min B. 12 min C. 271 min D. 118 min
If possible, evaluate the expression at the given value of the variable.
, x = -4
A. 
B. - 
C. - 
D. Undefined