Solve.The reciprocal of 8 plus the reciprocal of -4 is the reciprocal of what number?
A. - 
B. 
C. - 8
D. 8
Answer: C
Mathematics
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Write true or false for the statement.A right triangle has one angle of 90°.
A. True B. False
Mathematics
Solve the problem.A satellite is to be put into an elliptical orbit around a moon. The moon is a sphere with radius 165 km. Determine an equation for the ellipse, where x and y are measured in km, if the distance of the satellite from the surface of the moon varies from 238 km to 322 km.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Find A-1 if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Find the vertical asymptotes, if any, of the graph of the rational function.f(x) = 
A. x = 0 and x = 2 B. x = 0 and x = -2 C. x = 2 D. no vertical asymptote
Mathematics