A jar contains only pennies, nickels, dimes, and quarters. There are 21 pennies, 26 dimes, and 15 quarters. The rest of the
coins are nickels. There are 76 coins in all. How many of the coins are not nickels? If n represents the number of nickels in the jar, what equation could you use to find n?
If there are 76 coins in the jar in total,All you do is add all of the number of each coin there is except nickels and add it together. Then you take that amount away from the total number of coins to find out how many nickels are inside the jar.
No, because it says bridge B has twice as many so there are 40 cars for 2 hours because it says twice as much time. So the unit rate is 20 cars each hour, so there will be the same unit rate.
