Find the expression.u = 9i + j, w = i - 9j ;  Find 8u - 6w.

A. 24i + 62j
B. 66i + 62j
C. 66i - 46j
D. 66i + 9j


Answer: B

Mathematics

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Find the slope of the polar curve at the indicated point.r = 2(1 + cos ?), ? = 

A. -2
B.
C. 1
D. 2

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Use Stokes's Theorem to calculate .F = -3x2yi + 3xy2j + z5k; S is the portion of the paraboloid 1 - x2 - y2 = z that lies above the x-y plane

A. 6
B. 6?
C. 1?
D. ?

Mathematics

Multiply.(-3m4z4)(5m4z2)

A. -15m8z6 B. -15mz8 C. -15m6z8 D. -15mz6

Mathematics

Decide if the sets are equivalent to one another.{0} and {775}

A. Equivalent B. Not equivalent

Mathematics