Final answer:
c) 21/40t - 22. To simplify the given expression, combine like terms and perform necessary calculations. The simplified expression is (21/40)t - 22. Option (c) is correct.
Step-by-step explanation:
To simplify the expression, we need to combine like terms and perform the necessary calculations. Let's break down the expression step by step:
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- Three-fourths times t can be rewritten as (3/4)t.
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- Two-fifths times t can be written as (2/5)t.
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- Five-eighths times t can be written as (5/8)t.
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- Combining all the terms, the simplified expression becomes (3/4)t - 5 + (2/5)t - ((5/8)t + 17) - (71/40)t - 12.
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- Simplifying further, we have (3/4)t - 5 + (2/5)t - (5/8)t - 17 - (71/40)t - 12.
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- Combining the like terms, the simplified expression is (3/4 - 5/8 - 71/40)t + (2/5 - 17 - 12).
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- This simplifies to (21/40)t - 22.
Therefore, the expression can be written as (21/40)t - 22. Option (c) is the correct answer.