Add or subtract as indicated.(r + 5s - 3) + (-5r + s) + (s - 2)

A. -4r + 7s - 5
B. -6r + 7s - 5
C. -5r + 5s - 5
D. -4r + 6s - 5


Answer: A

Mathematics

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Describe the next row operation that should be performed to make the matrix closer to row echelon form.

A. Replace R2 with - R2.
B. Replace R2 with 15R1 + R2.
C. Replace R2 with -15R1 + R2.
D. Replace R2 with R2.

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Solve the equation.1.1x + 4.3 = 0.7x + 1.14

A. 0.127 B. -7.8 C. -7.9 D. -7.11

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Find the general solution of the differential equation. + 2xy = 23x

A.  + Me-x2
B.  + 2x + Me-x2
C.  + Mex2
D. 23 + Mex2

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