Solve the problem.A bridge with a semi-elliptical arch extends over a river as shown. Find an equation of the ellipse that represents the arch of the bridge.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Identify the equation as either linear or nonlinear by trying to write it in the form 
8x2 - 3x = 8(x2 + 9) - 9x
A. Linear B. Nonlinear
Mathematics
Combine like terms.18.8x + 8.5y - 11.9x - 22.6y
A. 7.9x - 14.1y B. -7.2xy C. 6.9x + 14.1y D. 6.9x - 14.1y
Mathematics
Divide.0.6198 ÷ 0.01
A. 6.198 B. 0.006198 C. 61.98 D. 619.8
Mathematics
Convert to trigonometric notation and perform the indicated operation.
A. -
B. -
i
C. -
+ 
i
D. 
Mathematics