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kogti [31]
3 years ago
10

A city has 3 new houses for every 9 old houses. If there are 21 new houses in the city, how many old houses are there?

Mathematics
1 answer:
kipiarov [429]3 years ago
5 0
To find your answer you would divide 21 by 3 which would be 7, once you've got 7 you would multiply it by 9 which would give you the amount of old houses that there is which would be 63.
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Answer:

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In the first blank, he could choose any move, and there are three, rock, paper, and scissors. In the first blank, you would put 3. Then, since you already picked one, you can't repeat it, so you would end up with 2 for the second blank. Continuing with the next blanks, the third, fourth, and fifth spaces would be 2 choices because you cannot have the one choice you chose previously. In the end, the blanks would look somewhat like this:

 

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And you would multiply all the numbers.

 

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