Add or subtract, as indicated. Assume that all variables represent positive real numbers.x + 7 - 3x

A. 13x
B. 4x
C. 13x
D. 4x


Answer: A

Mathematics

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Using Green's Theorem, compute the counterclockwise circulation of F around the closed curve C.F = (x - ex cos y)i + (x + ex sin y)j; C is the lobe of the lemniscate r2 = sin 2? that lies in the first quadrant.

A. 1
B.
C.
D. 0

Mathematics

Evaluate the integral.

A. 10i + 18j + k
B. 10i - 18j + k
C. 5i - 18j + k
D. 10i - 18j + k

Mathematics

An open rectangular box with volume 6 m³ has a square base. Express the surface area of the box as a function S(x) of the length x of a side of the base.

What will be an ideal response?

Mathematics

Solve the equation. -  = 

A. {62}
B. {}
C. {31}
D. {-31}

Mathematics