Solve the problem.A parabolic train track must pass through the points (1, 0), (0, 8), and (0, -8), where the units are kilometers. Find an equation for the train tracks in the form 
A. x = 
(y - 0)2 - 1
B. x = 
(y - 0)2 + 1
C. x = - 
(y - 0)2 + 1
D. x = 
(y - 0)2 - 1
Answer: C
Mathematics
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Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 5x
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(5x - y)2
A. 25x2 - 5xy + y2 B. 25x2 + y2 C. 25x2 - 10xy + y2 D. 25x2 - 10xy - 2y2
Mathematics
Find an equation for the ellipse described.Center at (0, 0); focus at (5, 0); vertex at (7, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics