Solve the system using the inverse matrix method.
A. x = 2, y = -1; (2, -1)
B. x = -1, y = 2; (-1, 2)
C. x = -2, y = 1; (-2, 1)
D. x = 1, y = -2; (1, -2)
Answer: C
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Use De Moivre's theorem to simplify the expression. Write the answer in the form a + bi.(5(cos 315° + i sin 315°))5
A. 3.536 + 3.536i B. -2209.709 + 2209.709i C. 2209.709 + 2209.709i D. -3.536 + 3.536i
Express the indicated roots of unity in standard form a + bi.Cube roots of unity
A. cos 
+ i sin 
= 0.5 + 
i
cos 
+ i sin 
= -0.5 + 
i
cos 
+ i sin 
= -0.5 - 
i
B. 1 + 0i
cos 
+ i sin 
= -0.5 + 
i
cos 
+ i sin 
= -0.5 - 
i
C. 1 + i
cos 
+ i sin 
= -0.5 + 
i
cos 
+ i sin 
= -0.5 - 
i
D. 1 + 0i
cos 
+ i sin 
= 0.5 + 
i
cos 
+ i sin 
= -0.5 + 
i
Consider the following bar graph. What country used the most barrels of oil per day?
A. US B. Japan C. UK D. Germany E. France
Provide an appropriate response.What is the rule for dividing a decimal number by 0.00001?
What will be an ideal response?