Find the equation of the tangent line at the given value of x on the curve.2xy - y2 = 1, x = 1
A. x = 1
B. y = x - 1
C. y = 1
D. y = -x + 1
Answer: A
Mathematics
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Solve the absolute value inequality.|2x - 3| ? 2
A. 
< x < 
B. 
? x ? 
C. x ? 
or x ? 
D. x ? 
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Solve the problem.An arch for a bridge over a highway is in the form of a semiellipse. The top of the arch is 35 feet above ground (the major axis). What should the span of the bridge be (the length of its minor axis) if the height 28 feet from the center is to be 13 feet above ground?
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