you have these coins:\nwhich coins do you need to make a dollar?

Explanation:

Step1: Identify the value of the current coins

The coins are: 3 quarters ($25\text{c}$ each), 1 dime ($10\text{c}$), 1 nickel ($5\text{c}$), and 1 penny ($1\text{c}$). $$25 + 25 + 25 + 10 + 5 + 1 = 91\text{ cents}$$

Step2: Calculate the amount needed for a dollar

Subtract the current total from $100\text{ cents}$ ($1\text{ dollar}$). $$100 - 91 = 9\text{ cents}$$

Step3: Determine which option equals the needed amount

Option 1: 1 nickel ($5\text{c}$) + 4 pennies ($4\text{c}$) = $9\text{c}$. Option 2: 1 dime ($10\text{c}$) + 1 nickel ($5\text{c}$) + 2 pennies ($2\text{c}$) = $17\text{c}$. Option 3: 1 dime ($10\text{c}$) + 1 dime ($10\text{c}$) + 1 penny ($1\text{c}$) = $21\text{c}$.

Answer:

The first option: 1 nickel and 4 pennies.