Evaluate the expression without using a calculator.log99
A. 9
B. 1
C. 
D. 0
Answer: B
Mathematics
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Provide an appropriate response.Derive the identity sec-1(-x) = ? - sec-1 x by combining the following two equations:cos-1(-x) = ? - cos-1 xsec-1 x = cos-1(1/x)
What will be an ideal response?
Mathematics
Factor by grouping.2y - 8 + xy - 4x
A. (x - 4)(y + 2) B. (y - 4x)(2 + x) C. (y - 4)(2 + x) D. (x - 4)(2y + x)
Mathematics
Solve.The number of new residents in several towns during the years 2008 to 2010 is given in the following bar graph. 
What was the increase in the number of new residents in Middleton from 2009 to 2010?
A. 30 B. 52 C. 54 D. 40
Mathematics
Rationalize the denominator. Simplify, if possible. Assume that any variables represent positive real numbers. 
A. 
B. 
C. 
D. 
Mathematics