Find the LCM for the following:

a. 4a and 3b2
b. 6a2 and 4a3
c. 21xy2 and 28x2y
d. 5x3yz2 and 20xy2

a. 12ab2
b. 12a3
c. 84x2y2
d. 20x3y2z2

Mathematics

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Find the exact value of the following expression without using a calculator.cot 

A.
B.
C. 1
D.

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Mathematics

Indicate whether the number is a proper fraction, an improper fraction, or a mixed number.

A. mixed number B. proper fraction C. improper fraction

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Mathematics

Solve and write interval notation for the solution set. Then graph the solution set.10 < -5x ? 30

A. (2, 6]


B. (-6, -2)

C. [-6, -2)

D. [-6, -2]

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Mathematics

Solve. = 

A. 64
B. 4
C. 36
D. 18

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Mathematics