Factor the polynomial completely. If the polynomial is prime, so state.84x2 + 49xy + 7y2

A. (21x + 7y)(4x + y)
B. 7(3x + y)(4x + y)
C. 7(3x - y)(4x - y)
D. prime


Answer: B

Mathematics

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Solve the problem.Assume t is time measured in seconds and velocities have units of m/s. Find the displacement over the given interval for the velocity function v(t) = 3t2 + t + 7 on 0 ? t ? 2.

A. 13 m
B.  m
C. 24 m
D. 7 m

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Multiply or divide the fractions. Reduce to simplest form.2 ? 

A.
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Solve the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.

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Mathematics