Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.3x + 2y + z = 53x - 5y - z = 344x + y + 3z = 5
A. (5, -4, -3)
B. (-4, -3, 5)
C. (5, -3, -4)
D. No solution
Answer: C
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Write as a proportion.If 52 pounds of potatoes is enough to feed 130 children, then 60 pounds should be the right amount for 150 children.
A. 
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Round the whole number to the given place value.18,666,265 to the nearest million
A. 19,000,000 B. 18,000,000 C. 18,666,000 D. 18,700,000
Solve.The manager of a university cafeteria needs to purchase 62 kg of mayonnaise. If his wholesaler sells mayonnaise in 6000 g jugs for $3.35 each, how much will the manager have to spend?
A. $3.46 B. $207.70 C. $20.10 D. $34.62
Determine the domain and the range of the function.f(x) = x2 - 8x + 7
A. domain: all real numbers range: {y|y ? 9} B. domain: all real numbers range: all real numbers C. domain: all real numbers range: {y|y ? -9} D. domain: {x|x ? -4} range: {y|y ? -9}