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Car 1 weighs 4800 lbs and car 2 weighs 3900 lbs. after this accident car 1 skids for 50 feet and car 2 for 70 feet. The cars have the same braking system and a test skid yields a distance of 42 feet with an initial velocity of 30 MPH. What were the initial velocities of these two cars before the accident?

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