To determine how much pizza the Mendes family ate on Saturday, we know that they had 49 pizzas left over after Friday. On Saturday, they ate 34 of those leftover pizzas. Therefore, the amount of pizza they ate on Saturday is simply 34.
Looking at the options provided:
- A: Not enough information to determine what this represents.
- B: Not enough information to determine what this represents.
- C (49×34): This doesn't make sense in this context. It suggests multiplying the number of leftover pizzas by the number they ate, which is not the correct calculation for the amount eaten.
- D (49+): This is incomplete and does not pertain to the amount they ate.
Based on the context and the mathematical operations needed, the Mendes family ate 34 pizzas on Saturday.
There aren’t any of the options provided that correctly answer the question. The appropriate answer for how much pizza they ate is simply 34.