1. A box of 80 coins, consisting of only nickels and dimes, is worth 7 dollars and 80 cents. Find the number of nickels.
2. Two drivers are 420 miles away from each other when they started moving towards each other. They meet after 4 hours. What is the speed of the first car, if the second car's speed is 45 mph?
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Home » Mathematics » 1. A box of 80 coins, consisting of only nickels and dimes, is worth 7 dollars and 80 cents. Find the number of nickels. 2. Two drivers are 420 miles away from each other when they started moving towards each other. They meet after 4 hours.