20.

Solve this problem:

RT = R1 + R2 + R3 + R4 + ... ; R1 = 1,000, R2 = 5,000, R3 = 3,500

46b.

If you missed either of the problems in the last step, solve this

problem.

If you did not miss them, skip this problem.

I = _______________

71.

4, 6, and 8 will all divide 24.

Therefore, 24 can be the common

denominator for these fractions.

A common denominator is a number that can be ______________ by all the

denominators.

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