9. The pizza dough recipe shown makes one batch of dough. Charlie wants to make a half batch. She has 1 cup of flour. How much more flour does she need?

The pizza dough recipe makes one batch, and Charlie has 1 cup of flour. To make a half batch, she would need half the amount of flour required for a full batch. Let's assume the recipe calls for X cups of flour for one batch. To make a half batch, she would need X/2 cups of flour. Since Charlie has 1 cup of flour and needs X/2 cups for a half batch, we can set up the following equation: 1 cup (Charlie has) = X/2 cups (half batch) To find out how much more flour Charlie needs, we need to solve for X: 1 = X/2 2 = X So, the full batch recipe requires 2 cups of flour. To make a half batch, Charlie would need 1 cup of flour (half of 2 cups). Since Charlie already has 1 cup of flour, she does not need any more flour to make a half batch. She has exactly the amount she needs.