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Physics and Algebra

1. Jeff rode his bike 45 miles to get to the park, and his co-worker Chris rode his bike 70 miles to meet Jeff at the park. Chris averaged 5 mph more than Jeff, and his trip took one-half hour longer than Jeff. How fast was each traveling?

2. Mike found a good deal on some golf clubs at an online auction site. The clubs were selling for $238 CAN. He wanted to find out if this was a good deal, so he check the newspaper to find out the current exchange rate. He saw that today the Canadian exchange rate was $1.00US to $1.52 CAN. If Mike decides to buy these golf clubs, how much will it cost in US dollars?

Solution Preview

1. Jeff rode his bike 45 miles to get to the park, and his co-worker Chris rode his bike 70 miles to meet Jeff at the park. Chris averaged 5 mph more than Jeff, and his trip took one-half hour longer than Jeff. How fast was each traveling?
Sol: Suppose Jeff was traveling at x mph and Chris was traveling at y ...

$2.19