Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: B
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the velocity vector.r(t) = (cot t)i + (csc t)j
A. v = (-sec2 t)i - (tan t sec t)j B. v = (-csc2 t)i - (cot t csc t)j C. v = (sec2 t)i + (tan t sec t)j D. v = (csc2 t)i + (cot t csc t)j
Mathematics
Make a line graph of the data given in the table.
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation and simplify. Write the answer in the form a + bi.
A. 
+ 
i
B. - 
- 
i
C. 
- 
i
D. - 
+ 
i
Mathematics
The graph of a function is given. Decide whether it is even, odd, or neither.
A. even B. odd C. neither
Mathematics