Match the equation to its graph.y = -6
A. 
B. 
C. 
D. 
Answer: A
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Add or subtract as indicated. Simplify if necessary.
+ 
A. 
B. 
C. 
D. 
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 4x + 6y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Calculate the slope of the line passing through the given points. If the slope is undefined, so state. Then indicate whether the line rises, falls, is horizontal, or is vertical.(-1, -8), (-1, -7)
A. 0, is horizontal
B. 
, rises
C. 
, rises
D. undefined, is vertical
Evaluate.-16.2 + 39.25
A. 23.05 B. 22.97 C. -23.05 D. 23.75