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 + 2
i
D. 2 - 2
i
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