# math

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a model of a house is drawn using a scale of 3in=15ft. what is the length of the actual house if the model has a length of 15in

• math -

Cross multiply and solve for x

3/15 = 15/x

• math -

so is it x=225in

• math -

No.

Cross multiply:

15 * 15 = 3x

225 = 3x

75 = x

The actual house is 75 feet long.

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