Fill in the missing factor.81x2 - 117xy + 40y2 = (9x - 5y)( )
A. 9x - 8y
B. -8y - 9x
C. 9 - 8xy
D. -8x - 9y
Answer: A
Mathematics
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Compute and simplify the difference quotient 
, h ? 0.f(x) = 4x - 15
A. 15
B. -15h
C. 4
D. 
Mathematics
Answer the question.How can the graph of f(x) = 
+ 6 be obtained from the graph of 
A. Shrink it vertically a factor of 
. Shift it 6 units up.
B. Shift it horizontally 12 units to the left. Shift it 6 units down.
C. Shift it horizontally 12 units to the right. Shift it 6 units up.
D. Stretch it vertically by a factor of 12. Shift it 6 units up.
Mathematics
?Find the radius of convergence of the series 
.
?
A. ?1 B. ?2 C. ?3 D. ?7 E. ?9
Mathematics
Answer the question.Which one of the equations below matches the graph?
A. y = 4 cos
B. y = 4 sin
C. y = 2 cos
D. y = 4 cos
Mathematics