Solve.A bridge constructed over a river has a supporting arch in the shape of a parabola. The length of the road over the parabolic arch is 300 feet and the maximum height of the arch is 126 feet. Write the equation of the arch.
A. y = x2 + 126
B. y = 
x2 + 126
C. y = -x2 + 126
D. y = - 
x2 + 126
Answer: D
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Factor completely.x2 - x - 35
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