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A recipe for 20 rolls calls for five tablespoons of outter. How many tablespoons of butter are needec or thirty rolls?

User Kayaman
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Final answer:

To find the number of tablespoons of butter needed for thirty rolls, set up a proportion based on the given recipe. Solve the proportion to find that 7.5 tablespoons of butter are needed for thirty rolls.

Step-by-step explanation:

The student is dealing with a simple proportion problem in mathematics. To find out how many tablespoons of butter are needed for thirty rolls, you set up a proportion using the initial condition that 20 rolls require 5 tablespoons of butter. The proportion is as follows:

20 rolls / 5 tablespoons = 30 rolls / x tablespoons,

where x is the number of tablespoons needed for 30 rolls. To solve for x, you cross-multiply and get:

20x = 5 × 30,

20x = 150,

Then, divide both sides by 20 to solve for x:

x = 150 / 20,

x = 7.5 tablespoons of butter.

Therefore, the student needs 7.5 tablespoons of butter for thirty rolls.

User Oggmonster
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