Check the following addition. If the answer is incorrect, give the correct answer.1736

A. Incorrect; should be 1836
B. Correct
C. Incorrect; should be 1734
D. Incorrect; should be 1738


Answer: B

Mathematics

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Use the inverse of the coefficient matrix to solve the system of equations.  y + z = 8,3x    -z = 5, 2x + y + 3z = 9; A-1 = -  

A.
B.
C.
D.

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Find all cube roots of the complex number. Leave answers in trigonometric form.2 + 2i

A.  cis 20°,  cis 140°,  cis 260°
B.  cis 20°,  cis 140°,  cis 260°
C.  cis 30°,  cis 150°,  cis 270°
D.  cis 20°,  cis 140°,  cis 260°

Mathematics

Graph the system of inequalities. Shade the region that represents the points of intersection.

A.

B.

C.

D.

Mathematics

Evaluate.m2 when m = 3

A. 3 B. 9 C. 6 D. 5

Mathematics