Determine all pairs (x, y) of integer values of x and y that satisfy the equation.|x| + |y| = 3
A. (0, 3), (0, -3), (3, 0), (-3, 0), (1, 2), (-1, -2), (1, -4), (-1, 4), (2, 1), (-2, -1), (4, -1), (-4, 1)
B. (0, 3), (0, -3), (3, 0), (-3, 0), (1, -2), (-1, 2), (2, -1), (-2, 1)
C. (0, 3), (0, -3), (3, 0), (-3, 0), (1, 2), (1, -2), (-1, 2), (-1, -2), (2, 1), (2, -1), (-2, 1), (-2, -1)
D. (0, 3), (0, -3), (3, 0), (-3, 0), (1, 2), (1, -2), (-1, 2), (-1, -2)
Answer: C
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A. 
B. 
C. 
D. 
Find all the first order partial derivatives for the following function.f(x, y, z) = ln (xy)z
A. 
= - 
; 
= - 
; 
= ln (xy)
B. 
= z ln 
; 
= zln
; 
= ln (xy)
C. 
= 
; 
= 
; 
= ln (xy)
D. 
= 
; 
= 
; 
= z ln (xy)z-1
Solve the problem.A cab company charges a base rate of $1.50 plus 15 cents per minute. Let C(x) be the cost in dollars of using the cab for x minutes. Write a cost function.
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