Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: C
Mathematics
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True or false?For any data set the midrange, 
, is equal to the median.
A. True B. False
Mathematics
Use the given information to find the exact value of the trigonometric function.cos ? = - 
; sin ? > 0
Find cos 
.
A. 
B. 
C. - 
D. - 
Mathematics
Convert to percent notation.0.7
A. 0.7% B. 700% C. 0.07% D. 70%
Mathematics
Find the indicated matrix.Let A = 
and B = 
. Find 4A + B.
A. 
B. 
C. 
D. 
Mathematics