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Susan takes a 45-mile trip. She travels the first 15 miles in 40 minutes. She travels the remaining 30 miles at double the rate at which she traveled the first 15 miles. What is her average speed for the entire trip in miles per minute?To determine average speed, use the rate formula:

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Susan takes a 45-mile trip. She travels the first 15 miles in 40 minutes. She travels the remaining 30 miles at double the rate at which she traveled the first 15 miles. What is her average speed for the entire trip in miles per minute?<br>To determine average speed, use the rate formula: <img alt='Image' src='https://www.fatskills.com/images3/gre/inequ12_42.jpg'/>






 
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