Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 60 ft and the vertical clearance must be 30 ft at a point 9 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Write an equation in slope-intercept form of a line satisfying the set of conditions.Through (-8, 3), perpendicular to -2x - 5y = 31
A. y = 
x + 
B. y = 
x + 
C. y = - 
x + 23
D. y = 
x + 23
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Divide.
A. x2 - 5x - 3 B. -2x2 + 5x + 3 C. -2x2 + 3 D. x2 + 5x + 3
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Provide an appropriate response.Solve: 2x2 - 9x + 4 = 0
Fill in the blank(s) with the appropriate word(s).
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Write the rate as a fraction in simplest form.A car travels 60 miles in 10 minutes.
A. 
B. 
C. 
D. 
Mathematics