Helena needs 3.5 cups of flour per loaf of bread and 2.5 cups of flour per batch of muffins. She also needs 0.75 cup of sugar per loaf of bread and 0.75 cup of sugar per batch of muffins. Helena has 17 cups of flour and 4.5 cups of sugar available for baking.

For choice A, 2 loaves and 4 muffin batches use 2 × 3.5 + 4 × 2.5 = 17 cups of flour and (2 + 4) × 0.75 = 4.5 cups of sugar. Both totals match Helena’s supplies. The other choices use more than 17 cups of flour, so choice A is the only one that works.

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