Five boxes of crackers cost \( \$ 9 \). At this rate, how much do 20 boxes cost?

To determine the cost of 20 boxes of crackers based on the given rate, follow these steps: 1. **Find the Cost per Box:** You know that 5 boxes cost \$9. To find the cost of one box: \[ \text{Cost per box} = \frac{\$9}{5} = \$1.80 \text{ per box} \] 2. **Calculate the Cost for 20 Boxes:** Multiply the cost per box by the number of boxes you want to buy (20): \[ \text{Total cost} = 20 \times \$1.80 = \$36.00 \] **Alternatively, using a proportion:** \[ \frac{5 \text{ boxes}}{\$9} = \frac{20 \text{ boxes}}{x} \] Cross-multiply to solve for \( x \): \[ 5x = 20 \times 9 \\ 5x = 180 \\ x = \frac{180}{5} \\ x = \$36 \] **Answer:** 20 boxes of crackers cost **\$36**.