Jay walks at a speed of 3 miles per hour and runs at a speed of 5 miles per hour. He walks for w hours and runs for r hours for a combined total of 14 miles. Which equation represents this situation?
Correct answer: A. 3 +5 w r = 14
- A. 3 +5 w r = 14
- B. 1/3w+ 1/5r =14
- C. 1/3w=1/5r=112
- D. 3w + 5r = 112
Explanation
Choice A is correct. Since Jay walks at a speed of 3 miles per hour for w hours,Jay walks a total of 3w miles. Since Jay runs at a speed of 5 miles per hour for hours, Jay runs a total of 5r miles. Therefore, the total number of miles Jay runs travels can be represented by 3w +5r. Since the combined total number of milesis 14, the equation 3w +5r =14 represents this situation.
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