It’s simple subtraction the answer is 342
Answer and Step-by-step explanation:

<em><u>Formula : </u></em>
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<em><u>Solving for time:</u></em>



<em><u>Solving for distance:</u></em>
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<em><u>Average speed:</u></em>
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24 × 5/8 = 15, you can cross multiply by doing x/24 = 5/8 And solve for x