Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-5i
A. 5(cos 90° + i sin 90°)
B. 5(cos 0° + i sin 0°)
C. 5(cos 270° + i sin 270°)
D. 5(cos 180° + i sin 180°)
Answer: C
Mathematics
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Solve the problem.The sum of three numbers is -11. The first, minus the second, plus 4 times the third, is -4. The third, plus 3 times the first, plus the second, is -21. What are the numbers?
A. -5, -5, -1 B. 5, 5, 1 C. No solution D. -5, -5, -5
Mathematics
Give the rectangular coordinates for the point.(2, 270°)
A. (0, 2) B. (0, -2) C. (2, 0) D. (-2, 0)
Mathematics
Find the product and simplify.
? y6
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression by combining like terms.2x - 2y + 4 - 9x
A. -7x - 2y B. -5xy C. -7x - 2y + 4 D. -7x + 2y
Mathematics