Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 1
B. ?
C. 0
D. No limit
Answer: C
Mathematics
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Simplify. (Assume all variables are nonzero.)-50
A. -1 B. 1 C. -5 D. 0
Mathematics
Find the exact value of the composition.cot-1 
A. - 
B. 
C. 
D. - 
Mathematics
Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
?
A. x = 
, y = - 
, z = 0, w = 
; 
B. x = 1, y = -2, z = 0, w = 3; (1, -2, 0, 3)
C. x = -1, y = - 
, z = 0, w = 
; 
D. x = 
, y = -2, z = 0, w = 
; 
Mathematics
Write as a proportion.If 95 pounds of potatoes is enough to feed 190 children, then 105 pounds should be the right amount for 210 children.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics