Use the substitution-of-variable technique to solve the system analytically.
+ 
= 
- 
= - 
A. {(9, -4)}
B. 
C. {(4, -9)}
D. {(-9, 4)}
Answer: D
Mathematics
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(7y dx + 5y dy); C: The boundary of 0 ? x ? ?, 0 ? y ? sin x
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A. 8x - 26 B. -12x - 10 C. 8x - 5 D. 8x - 10
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A. - 
, - 3
B. 1, 
C. 
, 3
D. 
, - 
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Find the domain of the rational function.f(x) = 
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