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In a park there were a total of 13 bicycles and tricycles. If the total number of wheels was 31, how many tricycles were there?

x = bicycles
y = tricycles

2x + 3y = 31
x + y = 13

2x + 3y = 31
-2(x + y = 13)

2x + 3y = 31
-2x – 2y = -26
——————-
y = 5

x + 5 = 13
x = 8

(bicycles, tricycles) -> (8, 5)

There are 5 tricycles.



07 31st, 2010

Directed by Marco Mucig – www.snowgroup.net

Music: Ex-Otago
www.bicyclefilmfestival.com

Duration : 0:0:59

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07 31st, 2010

Are mountain bicycles good for street riding? I need a bike to get to work about 8 mile ride.

It’ll work just fine. 8 miles isn’t that far, and you’re not racing.



This is a 24 volt Generator attached to a bike. Permanent Magnet Motor.

Duration : 0:10:0

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07 28th, 2010

My grandparents gave me 2 Schwinn bicycles that they have had in their basement forever. One is a Schwinn Varsity and the other is a Schwinn Collegiate 3. The Varsity seems to be older than the Collegiate. My grandparents cannot remember when they bought the bikes, but they think it was between the mid 60s to the early 70s. I need to know how I can properly identify the year in which they were made. Also, if you could give me an estimate of their value, I would greatly appreaciate it!

You already have an answer for finding the year of manufacture. As to value, don’t expect much. These bikes were built in huge quantities and there are still a lot of them around, they were built to last. They were inexpensive new, and even in perfect condition, aren’t worth much more than when they were new. If you could sell both for $200 you would be doing well.



Track 20
9 Million bicycles, live AVO Session Basel 10.11.2007

Duration : 0:3:35

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Most men I’ve asked definitely prefer the women’s bikes with no crossbar. bicycles do not need to to be gendered, especially not for adults. Any reason why they still are?

women and men have different proportions in thier anatomy, thus the biggest difference for "Women Specific"designs. So a 5’8" woman and a 5’8" man are going to have different proportions in torso length, arm length, femur length, etc… And thus bikes *should* be gendered, at least they are in the upper-levels of bikes, not so in the department store level.

Several makers are making step-thru frames (or mixtes) for both men and women, as well – see: www.rivbike.com



07 23rd, 2010

Five minute video which lovingly zooms into bike parts, and names them. “Want to know your dropout from your downtube? And your seat collar from your seatpost? Watch this guide and you’ll be talking bike in 5 minutes.” The ‘bespoke’ soundtrack was made using bike parts (spokes, gear shifting, disc brake rotor twanging), recorded in my garage and then made into music by Greg Johnston.

Duration : 0:5:44

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How would you rate the overall quality of FUJI bicycles?

Fuji bikes are good quality and tend to be very good values as they are priced better than many other brands like Trek, Cannondale, Specialized etc.



07 20th, 2010

here you experience the new technology used for parking your bicycle ,its stored underground to make space to park as much as possible , using an electronic card you can put it in and get it back .

Duration : 0:4:32

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