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umka21 [38]
3 years ago
10

At a fair cake-eating contest, Bobby ate three cakes in 20 minutes. At the same speed, how long did it take to win the contest b

y eating twenty-one cakes? Give your answer in minutes
Mathematics
2 answers:
Alina [70]3 years ago
4 0

Answer:

140 minutes

Step-by-step explanation:

First divide 21 by 3 to get 7

Then do 20*7 to get 140 :)

aliina [53]3 years ago
4 0

Answer:

2 hours and 20 minutes.

Step-by-step explanation:

20 minutes is ⅓ of a full hour. This means that 20 x 3 is equal to the number of minutes in a hour. So, Let's find out how much thirds 21 is equal to. We will divide 21 by 7.

21 divided by 7 is equal to 3.

The answer to the question is 2 hours and 20 minutes.

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<h3>Answer: f(x) = (-1/2)x+1, choice B</h3>

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