Use the given row transformation to change the matrix as indicated.
; -2 times row 1 added to row 2
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.Suppose that the mean salary in a particular profession is $45,000 with a standard deviation of $2,000. To what percentile does a salary of $48,000 correspond?
A. 41st B. 91st C. 93rd D. 43rd
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Solve the problem.The three angles in a triangle always add up to 180°. If one angle in a triangle is 114° and the second is 5 times the third, what are the three angles?
A. 114°, 56°, 10° B. 114°, 54°, 12° C. 114°, 53°, 13° D. 114°, 55°, 11°
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Graph the equation and its tangent.Graph y = 5x2 and the tangent to the curve at the point whose x-coordinate is -2.
A. 
B. 
C. 
D. 
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Simplify.0.473 + 8.66 ÷ 0.04
A. 228.325 B. 221.23 C. 216.973 D. 22.123
Mathematics