Find the inverse of the matrix.





a.

b.

c.

d.

e.


c.

Mathematics

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Write the complex number in rectangular form.4(cos 300° + i sin 300°)

A. 2 - 2i
B. -2 - 2i
C. -2 + 2i
D. 2 - 2i

Mathematics

Write as a decimal.85.84%

A. 0.8484 B. 0.08584 C. 0.8584 D. 8.584

Mathematics

Solve the system in terms of the arbitrary variable x.  x + y + z = 94x - 3y + 2z = 7

A.
B.
C. ?
D.

Mathematics

Find the amount of sales tax or tax rate and the total cost. Round money answers to the nearest cent if necessary.Amount of sale: $255  Amount of tax: $15.30

A. 8%, $270.30  B. 6%, $270.30  C. 0.6%, $270.30 D. 7%, $270.30 

Mathematics