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Crystal is loading a wheelbarrow with bricks that each have the same weight so she can build a fire pit in her backyard. When the wheelbarrow had 40 bricks, it weighed 145 pounds. When the wheelbarrow had 45 bricks, it weighed 160 pounds. Crystal says that the initial value is 145 pounds because that was the weight when she first weighed the wheelbarrow.

a. What does the initial value represent in this scenario?

Answer :

Final answer:

The initial value of 145 pounds represents the combined weight of the wheelbarrow and the 40 bricks it contains. When Crystal added more bricks, the total weight increased, allowing us to calculate each brick's weight.

Explanation:

In this scenario, the initial value of 145 pounds represents the total weight of the wheelbarrow when it contains 40 bricks. It is the weight of the wheelbarrow plus the weight of the bricks it contains. The wheelbarrow itself also has its own weight which is part of the initial value. However, since we don't have the standalone weight of the wheelbarrow, we interpret the initial value as the total weight with the 40 bricks inside.

When Crystal added 5 more bricks, the total weight increased to 160 pounds. Therefore, the difference, 160 - 145 = 15 pounds, can be attributed to the weight of the 5 bricks. Hence, each brick weighs 15/5 = 3 pounds.

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