Solve using matrices.5x + y - 5z + w = -21-x + 5y + z - 5w = 233x - y + 5z + 5w = 15 x + y - 5z - w = -23
A. (-1, 2, 7, 1)
B. (-5, 3, -1, 6)
C. (3, -2, 0, 5)
D. (-3, -6, 12, 5)
Answer: B
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Solve the triangle.a = 5, b = 5, c = 3
A. A = 35°, B = 72.5°, C = 72.5° B. A = 72.5°, B = 72.5°, C = 35° C. A = 73.5°, B = 73.5°, C = 33° D. A = 72.5°, B = 35°, C = 72.5°
Find the exact value of the expression or state that it does not exist.cos
A. 0
B. 
C. 
D. 1
Solve the problem.The formula C = 2x + 20 represents the estimated future cost of yearly attendance at State University, where C is the cost in thousands of dollars x years after 2002. Use a compound inequality to determine when the attendance costs will range from 34 to 42 thousand dollars.
A. From 2010 to 2014 B. From 2009 to 2013 C. From 2010 to 2012 D. From 2008 to 2012
Convert the units using unit fractions.144 hr = 
days
A. 42 B. 48 C. 72 D. 6