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Mathematics 9 Online
OpenStudy (anonymous):

klm

OpenStudy (anonymous):

They are separating at the rate of (10+5) or 15 miles per hour. Since 45 is 3 times 15 they will be 45 miles apart in 3 hours.

OpenStudy (solomonzelman):

@GirlByte you are right! Exactly!!!!!!!!!! |dw:1383400800509:dw| every hour they are departing by 15 miles. so 15x=45 x=3 in there hours.

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