Find an equation for the ellipse described.Center at (0, 0); focus at (-6, 0); vertex at (7, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: D
Mathematics
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Graph the polar equation.r = 7 cos 5?
A. 
B. 
C. 
D. 
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Find the sum of the series.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Let g(x) = x2 + 3x + 1. Find the number of points that lie on the graph of g at the height y = 19.
A. 0 B. 1 C. 2
Mathematics
Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y varies directly with x. When x = 
, then y = 9.
A. k = 
; y = x + 
B. k = 
; y = 
x
C. k = 36; y = 36x
D. k = 
; y = 
x
Mathematics