Final answer:
Without the exact carbohydrate content per serving of crackers, an estimate based on 1 gram of carbohydrates providing 4 calories can be used. For example, if a serving has 10 grams of carbohydrates, two servings would equal 80 calories from carbohydrates.
Step-by-step explanation:
To calculate the calories from carbohydrates you'd take in by eating 2 servings of crackers, you'll need to know the amount of carbohydrates per serving. However, if we don't have the specific amount of carbohydrates in a serving of crackers, we can use an estimation based on general knowledge that 1 gram of carbohydrates provides 4 calories. If a serving of crackers contains, say, 10 grams of carbohydrates, then two servings would contain a total of 20 grams of carbohydrates. Therefore, the number of calories from carbohydrates for two servings is:
20 grams of carbohydrates × 4 calories/gram = 80 calories.