Add or subtract as indicated. Simplify the result if possible. If an answer is an improper fraction, write it as a mixed number.
+ 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find 
and 
.f(x, y) = 
A. 
= - 
; 
= - 
B. 
= - 
; 
= - 
C. 
= 
; 
= 
D. 
= - 
; 
= - 
Mathematics
Write an equivalent double integral with the order of integration reversed.
A. 
B. 
C. 
D. 
Mathematics
Find an equation of variation for the given situation.y varies jointly as x and z, and y = 225 when x = 9 and z = 5
A. y = 25x
B. y = 
C. y = 7xz
D. y = 5xz
Mathematics
Express in terms of sums and differences of logarithms.logb
A. 
logbx ? logby ÷ 
logbz
B. 
logbx + logby - 
logbz
C. 
logbx - logby + 
logbz
D. 
logbx + 2logby - 5logbz
Mathematics