Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution.5x + 2y + z = -223x - 3y - z = -73x + y + 3z = -3
A. {(-4, 4, -3)}
B. {(4, -3, -4)}
C. ?
D. {(-4, -3, 4)}
Answer: D
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Use a power-reducing identity to find the exact value of the expression.cos2 (75°)
A. 
B. 
C. 
D. 
Simplify.
A. 9
B. 21
C. 3
D. 
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (-2, 2)
foci at (-2 + 
, 2), (-2 - 
, 2)
vertices at (-4, -2), (8, -2)
B. center at (2, -2)
foci at (- 
, -2), (
, -2)
vertices at (6, -2), (-6, -2)
C. center at (2, -2)
foci at (2 + 
, 2), (2 - 
, 2)
vertices at (6, -2), (-6, -2)
D. center at (2, -2)
foci at (2 + 
, -2), (2 - 
, -2)
vertices at (-4, -2), (8, -2)
The circle graph shows the results of the student council presidential election. The complete circular area represents 100% of the votes.
The circle graph shows what percent of the vote each person received.Find the ratio of Jim's votes to total votes cast.
A. 
B. 
C. 
D. 