Suppose Tommy walks from his home at (0, 0) to the mall at (0, 9), and then walks to a movie theater at (5, 9). After leaving the theater Tommy walks to the store at (5, 0) before returning home. If each grid square represents one block, how many blocks does he walk?

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Step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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45

step-by-step explanation: