Ive problems 4 and 5 . Show your work. ylon has 20 math problems for homework. He has cornpleted \( 60 \% \) of the oblems so far. How many problems has he completed? spends \( \$ 9 \) on his lunch. This is \( 30 \% \) of the money he had in his wallet.

Let's solve each problem step by step. ### Problem 4: **Known Conditions:** - Total math problems: \( 20 \) - Percentage completed: \( 60\% \) **Step 1: Calculate the number of problems completed.** To find the number of problems completed, we can use the formula: \[ \text{Completed Problems} = \text{Total Problems} \times \left(\frac{\text{Percentage Completed}}{100}\right) \] Substituting the known values: \[ \text{Completed Problems} = 20 \times \left(\frac{60}{100}\right) \] **Step 2: Perform the calculation.** Calculating the above expression: \[ \text{Completed Problems} = 20 \times 0.6 = 12 \] **Conclusion for Problem 4:** Ylon has completed \( 12 \) problems. --- ### Problem 5: **Known Conditions:** - Amount spent on lunch: \( 9 \) - Percentage of total money: \( 30\% \) **Step 1: Calculate the total amount of money in the wallet.** To find the total amount of money, we can use the formula: \[ \text{Total Money} = \frac{\text{Amount Spent}}{\frac{\text{Percentage}}{100}} \] Substituting the known values: \[ \text{Total Money} = \frac{9}{\frac{30}{100}} = \frac{9}{0.3} \] **Step 2: Perform the calculation.** Calculating the above expression: \[ \text{Total Money} = \frac{9}{0.3} = 30 \] **Conclusion for Problem 5:** He had \( 30 \) dollars in his wallet. --- ### Summary of Solutions: - Ylon has completed \( 12 \) math problems. - He had \( 30 \) dollars in his wallet.