Find the inverse, if it exists, of the given matrix.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Simplify the expression. Assume that all variables are non-negative. 
A. 
B. 
C. 
D. 
Mathematics
Decide whether the ordered pair is a solution of the given system.
A. No B. Yes
Mathematics
Provide an appropriate response.When the numerator is the same as the denominator, for example 
, the fraction is called a(n) 
fraction.
A. whole B. proper C. uncommon D. improper
Mathematics
The cost function for a certain model of personal digital assistant (PDA) is given by 
, whereC is measured in dollars andxis the number of PDAs produced. Write a model for the average cost per unit produced and also find the average costs per unit when ?x ?= 180 and ?x? = 1030. (Round your answer to two decimal places.)
?
A. 
?
B.
C.
D.
?
E.
?
Mathematics