Answer:
d + n = 22
0.10d + 0.05n = 2.50
Explanation:
Let's use the variables "d" for the number of dimes and "n" for the number of nickels in Jeremy's wallet. Then we can create the following system of equations to represent the given information:
d + n = 22 (the total number of coins is 22)
0.10d + 0.05n = 2.50 (the total value of the coins is $2.50)
The first equation represents the fact that the total number of coins is 22. The second equation represents the fact that the total value of the coins (in dollars) is $2.50.