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Each year for 3 years, the time it takes to run a mile decreases by 7 seconds. What number represents this total change in time.
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Each year for 3 years, the time it takes to run a mile decreases by 7 seconds.

What number represents this total change in time.

User Liu Zhang
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1 Answer

6 votes

Answer:

21

Explanation:

User Viksit
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