Simplify the following. Indicate if the expression is not a real number.
A. 9
B. -81
C. -9
D. 81
Answer: C
Mathematics
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Find the sum of the geometric series for those x for which the series converges.
A. 
B. 
C. 
D. 
Mathematics
Find the acute angle, in radians, between the lines.5x + 2y = 9 and 6x + 5y = 7
A. 0.9510 radians B. 1.256 radians C. 0.3143 radians D. 1.885 radians
Mathematics
Find the volume of the indicated region.the region bounded by the paraboloid 
and the cylinder 
A. 1944? B. 1728? C. 432? D. 648?
Mathematics
Find y in terms of x.
= 5x-3/4, curve passes through (1, 8)
A. y = 5x1/4 + 3
B. y = 20x1/4 + 160
C. y =- 
x-7/4 - 3
D. y = 20x1/4 - 12
Mathematics