Write a chain rule formula for the following derivative.
for u = f(p, q); p = g(x, y, z), q = h(x, y, z)
A. 
= 
+ 
B. 
= 
+ 
+ 
C. 
= 
D. 
= 
+ 
Answer: A
Mathematics
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In the circuit below, find Z when XL = 2.7 Kê and é = 30ø.
a. 3.1 Kê
b. 5.4 Kê
c. 4.7 Kê
d. 6.2 Kê
e. 4.3 Kê
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Add or subtract.(6 + 9i) - (-2 + i)
A. -8 - 8i B. 8 + 8i C. 8 - 8i D. 4 + 10i
Mathematics
Solve the problem.One of Sal's customers ordered items costing 
and 
If Sal's commission on each item is 
what is his total commission on this sale? Round to the nearest cent.
A. $12.23 B. $15.96 C. $18.83 D. $12.87
Mathematics
Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.x = 7 sin t, y = 7 cos t; 0 ? t ? 2?
A. y = 
= 49; -? < x < ?
B. y2 - x2 = 49; -? < x < ?
C. y = x2 - 9; -2 ? x ? 2
D. x2 + y2 = 49; -7 ? x ? 7
Mathematics