Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.7
+ 7i
A. 14( cos 330° + i sin 330°)
B. 14( cos 60° + i sin 60°)
C. 14( cos 30° + i sin 30°)
D. 14( cos 300° + i sin 300°)
Answer: C
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = x ln (y - x)
A. 
= 
; 
= - 
; 
= 
= 
B. 
= 
; 
= 
; 
= 
= 
C. 
= 
; 
= - 
; 
= 
= - 
D. 
= 
; 
= - 
; 
= 
= 
Mathematics
Find an equation of the line having the given slope and containing the given point. m = 5; (-4, 0)
A. y = 5x + 20 B. y = -5x + 16 C. y = 5x - 23 D. y = 5x - 21
Mathematics
Add.- 
+ 
A. - 
B. - 1
C. 
D. 
Mathematics
Factor.42m9 + 60m6 + 36m3
A. No common factor B. 6(7m9 + 10m6 + 6m3) C. m3(42m6 + 60m3 + 36) D. 6m3(7m6 + 10m3 + 6)
Mathematics