Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x =8, y =6; (8, 6)
B. x =8, y =8; (8, 8)
C. x =-6, y =6; (-6, 6)
D. inconsistent
Answer: D
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Graph the function.f(x) = 
? 4x.
A. 
B. 
C. 
D. 
Solve the problem.An oil refinery can produce gasoline, heating oil, or a combination of the two. The product exchange function for gasoline, x, and heating oil, y, in thousands of gallons per week is: ?y = 
By sketching the quadrant I portion of the graph of this function, estimate the maximum quantity of each product that can be produced per week.
A. gasoline: 12,000,000 gal; heating oil: 500,000 gal B. gasoline: 12,000 gal; heating oil: 500 gal C. gasoline: 6,000,000 gal; heating oil: 250,000 gal D. gasoline: 500,000 gal; heating oil: 12,000,000 gal
Solve the system of equations by graphing.2x - y = 3 y = 1 
A. (1, 2) B. (2, 1) C. (-2, -1) D. no solution
Find the midpoint of the line segment whose endpoints are given.(6, 7), (0, 1)
A. 
B. (6, 8)
C. (6, 6)
D. 