Find the inverse of the matrix (if it exists).
?
?
A. ?
B. ?
C. ?
D. ?
E. Does not exist
Answer: A
Mathematics
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Express the number in scientific notation.21,000,000
A. 2.1 x 106 B. 2.1 x 107 C. 2.1 x 10-6 D. 2.1 x 10-7
Mathematics
Evaluate the expression by first changing the form. Verify the answer by use of a calculator. 
A. 
B. 
C. 2
D. 
Mathematics
Perform the operation and write the result in the standard form.(-4 - 6i) - (6 - i)
A. -10 + 5i B. 10 + 5i C. -10 - 5i D. -10 - 6i
Mathematics
Find the value of the expression.Let logb A = 2 and logb B = -5. Find logb B2.
A. -25 B. 4 C. 25 D. -10
Mathematics