SOLUTION: I can't figure out the formula to use for this problem, I have the answer in the back of the book, but I don't understand how to get there. Can you please show me the step by step

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Question 201949This question is from textbook Beginning and Intermediate Algebra
: I can't figure out the formula to use for this problem, I have the answer in the back of the book, but I don't understand how to get there. Can you please show me the step by step process on how to get there? Thank you
Erica This question is from textbook Beginning and Intermediate Algebra

Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
post the problem