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Divide Distance by Time to calculate Speed. 15 / 70 = .2142857 miles per minute or an average of 1/5 to 1/4 mile per minute.

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โˆ™ 16y ago
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Q: Sarah bikes 15 miles in 70 minuteswhat is her average speed per minute?
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How many of each color bikes are there if there are 18 bikes in a bike rack 4 more blue bikes than yellow bikes and 2 less yellow bikes than green?

18-6= 12 ..... 12-6=6 so we now have equal parts of all 3 colors: 6 blue, 6 yellow and 6 green. We know we have 2 less yellow than green so 6-2= 4 yellow We also know there are 4 more blue than yellow so 4+4 = 8 blue We had 6 green in our original problem, so we still have 6 green bikes. After subtraction we have 4 yellow bikes and after addition we have 8 blue bikes. 8 blue bikes 6 green bikes 4 yellow bikes 8+6+4 = 18 You could use division and/or algebra to solve this, but only addition and subtraction have been used to keep the process simple.


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Bill and Amy want to ride thier bikes from their neighbourhood to school which is 14,4 kilometers away.It takes Amy 40 minutes to arrive at school. Bill arrives 20 minutes after Amy. How much faster is Amy's average speed for the entire trip? [in meters/ in second]


Charlie bikes 9 miles every day. Which equation models the situation?

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