# Math algebra

the scale on aroad map indicates that 1/4 inch equals 20 miles. How far apart in miles are two towns that are 3 1/2 inches away on the map.

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1. How many fourths are in 3 1/2? Ans:14

So the distance must be 14*20

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2. 3.5" x (20 miles/0.25") = ??
Check my work.

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3. The answer in my book is 280. I can not figure out how to write the equation using proportiions using cross multiply. I have tried several ways and unable to get the answer in the book.

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posted by Rose
4. 0.25 / 20 = 3.5 / x

Cross multiply:

0.25x = 70
x = 280

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5. Thank you !

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posted by Rose

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