Rationalize the denominator.
A. -13 - 2
B. 13 - 2
C. 13 + 2
D. 2
- 13
Answer: D
Mathematics
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Use a CAS to plot the function near the point x0 being approached. From your plot guess the value of the limit.
A. 
B. 
C. 
D. 64
Mathematics
Solve the system by substitution or elimination. If a system is inconsistent or has dependent equations, say so.3x + 5y + z = 264x - 5y - z = -53x + y + 5z = 22
A. {(3, 3, 2)} B. {(3, 2, 3)} C. ?; inconsistent system D. {(2, 3, 3)}
Mathematics
Evaluate the radical function at the indicated value.f(x) = 
f(120)
A. 20 B. 25 C. 5 D. 125
Mathematics
Solve the problem.A railroad tunnel is shaped like a semiellipse. The height of the tunnel at the center is 15 ft and the vertical clearance must be 
at a point 
from the center. Find an equation for the ellipse. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics