Toby exercises 14 hours a week. John exercises 20% more than Toby and Jenny exercises two more hours than John. Which expression
represents how much Jenny exercises in w weeks? A) 13.2w B) 16.8w C) 18.8w D) 19.2w
2 answers:
Answer: C. 18.8w
Step-by-step explanation:
Since Toby exercise 14hours a week, and John exercises 20% more than Toby
John increment in number of hours compared to Tobi will be;
20/100 ×14 = 2.8hrs
This shows John exercises 2.8hrs more than Tobi. Total number of hours exercised by John will become;
14+2.8 = 16.8hrs
Since Jenny exercises two more hours than John, Total number of hours exercised by Jenny will be;
16.8hrs+2hrs
= 18.8hrs/week
If Jenny exercise 18.8hrs in a week, it means she will exercise 18.8×w/1 in w weeks which gives 18.8w weeks.
Answer:
Step-by-step explanation:
The number of hours that Tobi exercises in a week is 14 hours.
John exercises 20% more than Toby. The number of hours by which John exercises more than Tobi is
20/100 × 14 = 2.8hours
The number of hours that John exercises in a week is 14 + 2.8 = 16.8 hours.
Jenny exercises two more hours than John. The number of hours that John exercises in a week would be
16.8 + 2 = 18.8hours.
The expression representing how much Jenny exercises in w weeks would be
w × 18.8 = 18.8w hours
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