Simplify. Assume that variables can represent any real number.

A. 5t
B. 5
C. 5t2
D. 12

Answer: B

Mathematics

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Solve the problem.Find the mass of a wire of density ?(x, y, z) = 4z and has the shape of the helix  y = 3 sin t, z = 4t

A. 40?2
B. 80?2
C. 8?2
D. ?2

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Use the table of values of f to estimate the limit.Let f(x) = x2 - 5, find f(x).

A.
 ; limit = ?
B.
 ; limit = -15.0
C.
 ; limit = -5.0
D.
 ; limit = -3.0

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Decide whether the given set of numbers is a commutative group under the given operation.Integers; addition

A. Yes B. No

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Solve the problem.Anna spent $53.69 on a pair of shoes and $79.30 on a new jacket. How much money did she spend all together?

A. $130.99 B. $158.6 C. $132.99 D. $132

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Mathematics