Write a system of equations to describe the problem situation. It is not necessary to solve the problem. Paolo earns $481 from working 54 total hours at two jobs. He earns $6.55 per hour (x) at the first job and $9.20 per hour (y) at the second job.
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y, z) = ln (xy)z
A. 
= 
; 
= 
; 
= z ln (xy)z-1
B. 
= 
; 
= 
; 
= ln (xy)
C. 
= z ln 
; 
= zln
; 
= ln (xy)
D. 
= - 
; 
= - 
; 
= ln (xy)
Mathematics
Evaluate the square root.
A. 28,561 B. 14 C. 12 D. 13
Mathematics
Evaluate the integral.
A. cot ? - csc ? + C B. cot2 ? + csc ? + C C. csc2 ? - cot ? + C D. cot ? + csc ? + C
Mathematics
Evaluate the integral.
A. 
tan4 3x - 
tan2 3x - 
ln 
+ C
B. - 
tan4 3x + 
tan2 3x - 
ln 
+ C
C. 
tan4 3x - 
tan2 3x + 
ln 
+ C
D. 
tan4 3x - 
tan2 3x - ln 
+ C
Mathematics