Find an equation for the ellipse described.Foci at (±7, 0); x-intercepts are ±8
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
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Find the derivative.y = 
A. 
B. 
C. 
D. 
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Determine the limit by sketching an appropriate graph.
f(x), where f(x) = 
A. 0 B. -3 C. -9 D. -4
Mathematics
Graph the system of inequalities.4x + 8y ? -3y < - 
x + 5
A. 
B. 
C. 
D. 
Mathematics
Find the vertices and locate the foci for the hyperbola whose equation is given.
- 
= 1
A. vertices: (-10, 0), (10, 0)
foci: (- 
, 0) , (
, 0)
B. vertices: (-9, 0), (9, 0)
foci: (- 
, 0) , (
, 0)
C. vertices: (-9, 0), (9, 0)
foci: (-10, 0), (10, 0)
D. vertices: (0, -9), (0, 9)
foci: (- 
, 0) , (
, 0)
Mathematics