Provide an appropriate response.Suppose that you are solving a system of three linear equations by the row echelon method and obtain the following augmented matrix. 
What conclusion can you draw about the solutions of the system?
A. The system has no solutions.
B. The system has exactly one solution.
C. There is not enough information to draw any conclusion about the solutions of the system.
D. The system has infinitely many solutions.
Answer: A
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Convert the rectangular coordinates to polar coordinates, using radian measure for the angle.(8, -8)
A. 
B. 
C. 
D. 
Solve the problem.On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $7 each and a number of necklaces at $12 each. She wrote a check for $1140 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?
A. 65 bracelets and 55 necklaces B. 60 bracelets and 60 necklaces C. 70 bracelets and 50 necklaces D. 55 bracelets and 65 necklaces
Provide an appropriate response.Perform the operation and simplify your answer: 
- 
+ 3
Fill in the blank(s) with the appropriate word(s).
Multiply the polynomials. Express the answer as a single polynomial in standard form.(10y + x)(10y - x)
A. 100y2 + 20xy - x2 B. 100y2 - x2 C. 20y2 - x2 D. 100y2 - 20xy - x2