Find the exact value under the given conditions.cos ? = - 
, 
< ? < ?; sin ? = - 
, ? < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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A manufacturer of doors, windows, and cabinets writes her yearly profit (in thousands of dollars) for each category in a vector as: 
Her fixed costs of production can be described by the vector: 
Use the matrix operations on a graphing calculator to find her income if increasing it by 20% would cause an increase in profit of 50%. (Round to the nearest thousand dollars.)
What will be an ideal response?
Mathematics
Solve and check. Begin by using the addition or multiplication principles of equality to isolate the squared term. x2 + 2 = 66
A. ±7 B. 8 C. ±8 D. 33
Mathematics
Use Gauss-Jordan row reduction to solve the system of equations.
?
What will be an ideal response?
Mathematics
Subtract.
A. 719 B. 1211 C. 725 D. 625
Mathematics