15:80=9:n, 40, 48, 50, 100:n=15:12, 80, 82, 85, n:20=16:10, 30, 31, 32, A machine can produce 210 yards of fabric in 9 hours. How much fabric can the machine produce in 3 hours?, 60, 70, 80, A bicycle travels 85 miles in 6 hours (with a constant speed). How far will it take to travel 170 miles?, 10, 12, 14

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