Find the sum.13 + 

A. 6
B. 19
C. 6
D. 18

Answer: A

Mathematics

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Find the potential function f for the field F.F = 10x9y7z4i + 7x10y6z4j + 4x10y7z3k

A. f(x, y, z) = x30y21z12 + C
B. f(x, y, z) = 
C. f(x, y, z) = x10y7z4 + 7x10y6z4 + 4x10y7z3 + C
D. f(x, y, z) = x10y7z4 + C

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Mathematics

Solve the problem.Suppose that f and g are continuous and that  and   

A. -14 B. -42 C. 18 D. -30

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Solve the problem.What is the y-intercept of y = cot x?

A. 1
B.
C. 0
D. none

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Mathematics

Multiply and simplify.( + 1)( - 1)

A. 4 - 2
B. 4 
C. 4 + 2
D. 6 

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Mathematics