Graph the conic.r = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = 
A. 
= 
; 
= - 
; 
= 
= 
B. 
= - 
; 
= 
; 
= 
= 
C. 
= - 
; 
= 
; 
= 
= 
D. 
= - 
; 
= 
; 
= 
= 
Mathematics
Simplify.
? 
A. 
B. 3
C. 
D. 3
Mathematics
Solve.
+ 7 = 0
A. 7 B. 2401 C. - 2401 D. No solution
Mathematics
Solve.The planets in a certain solar system have a path that is an ellipse, with Star A as one of the foci. Planet X has a perihelion of 588.6 million miles and an aphelion of 631.8 miles. Find an equation for Planet X's orbit. Express your answer with a and b in millions of miles, rounded to the nearest tenth of a million.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics