SOLUTION: It's given that 10^x=3 and 10^y=7. What is 10^x+y?

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Question 490526: It's given that 10^x=3 and 10^y=7. What is 10^x+y?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Adding exponents is multiplying.
10%5E%28x%2By%29+=+10%5Ex%2A10%5Ey+=+21