Find the LCM of the expressions.7a3b, b2c, ac2

A. 7a4b3c3
B. 7
C. 7a3b2c2
D. 7a2b2c3

Answer: C

Mathematics

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Solve the problem.One side of a rectangle is 7 inches and the other side is x inches. Find the value of x if the area must be at least 84 square inches.

A. x ? 12 B. x ? 12 C. x = 12 D. 0 < x ? 12

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Mathematics

Find an equation for the indicated ellipse.Vertices (±5, -2) and foci (±3, -2)

A.  +  = 1
B.  +  = 1
C.  +  = 1
D.  +  = 1

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Mathematics

Solve the problem.If sin ? = -0.8, find the value of sin ? + sin (? + 2?) + sin (? + 4?).

A. -0.8 B. -2.4 + 6? C. -0.4 D. -2.4

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Mathematics

Express the statement as an equation involving the indicated variables.The surface area S of a sphere is 4 times ? times the square of the radius r.

A. S = 4? 
B. S = 4?r2
C. S = ?r2
D. S = 4?r

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Mathematics