Find an equation of variation for the given situation.y varies directly as x and inversely as z , and y = 19 when x = 19 and 
A. y = 19xz
B. y = 
C. y = 
D. y = 9xz
Answer: C
Mathematics
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Calculate the Taylor polynomial of second order that approximates f(x, y) near a.f(x, y) = 
, a = (2, 2)
A. 2 - 
(x - 2) + 
(y - 2) + 
(x - 2)2 - 
(x - 2)(y - 2) - 
(y - 2)2
B. 1 + 
(x - 2) + 
(y - 2) + 
(x - 2)2 + 
(x - 2)(y - 2) - 
(y - 2)2
C. 1 - 
(x - 2) + 
(y - 2) + 
(x - 2)2 - 
(x - 2)(y - 2) - 
(y - 2)2
D. 1 - 
(x - 2) - 
(y - 2) + 
(x - 2)2 - 
(x - 2)(y - 2) - 
(y - 2)2
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.
? 
A. 10
B. 10
C. 5
D. 5
Mathematics
Evaluate the expression.
What will be an ideal response?
Mathematics
Subtract.-19 - 4
A. -15 B. 23 C. 15 D. -23
Mathematics