Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = -2x + 2y
A. Domain: all points in the xy-plane; range: real numbers z ? 0; 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: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
Answer: C
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Write an equation in slope-intercept form of a line satisfying the set of conditions.Through (-4, 2), perpendicular to x = -6
A. y = -4 B. y = 2 C. y = -2 D. y = -4x + 2
Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the semicircle y = 
if the density of the rod is 
.
A. 
= 0, 
= 
B. 
= 1, 
= 1
C. 
= 0, 
= 1
D. 
= 
, 
= 
Graph.
+ 
= 1
A. 
B. 
C. 
D. 
Simplify.(2
+ 6
)(3
+ 9
)
A. 6
+ 54
B. 288 + 36
C. -252 + 36
D. 6
+ 54
+ 36