Solve the problem.An arch has the shape of half an ellipse. The equation of the ellipse is 
where x and y are in meters. How high is the center of the arch? 
A. 30 m
B. 36 m
C. 18 m
D. 15 m
Answer: D
Mathematics
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Simplify.19 + 21 ? 27
A. 426 B. 586 C. 1080 D. 67
Mathematics
Subtract.
- 
A. 
B. - 
C. 
D. - 
Mathematics
Factor.-128x2 + 96xy - 18y2
A. -2(8x + 3y)2 B. -2(8x - 3y)2 C. -2(8x + 3y)(8x - 3y) D. 2(8x + 3y)2
Mathematics
Find the equation of the transverse axis of the hyperbola.(x + 2)2 - 100(y + 4)2 = 100
A. y = 4 B. x = 10 C. y = -4 D. x = -3
Mathematics