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John entered a cross-country ski race. The first part of the race was 15 km long, and he completed it in 1 hour. The second part was 18 km long, and he completed this part in an hour and a half. What was John's average speed for the whole race? A. 28 kilometers per hour B. 27 kilometers per hour C. 13.6 kilometers per hour D. 13.2 kilometers per hour
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Pam buys a sleeve of ball bearings for her skateboard. each of the bearings is 1 1/5 inches wide. the sleeve is 9 3/5 inches long. how many ball bearings are in the sleeve? show your work.
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Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.
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John entered a cross-country ski race. The first part of the race was 15 km long, and he completed i...
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