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mixer [17]
3 years ago
12

If a person bikes 2.4 miles in 10 minutes how far can he bike in 30 min

Mathematics
1 answer:
Sedaia [141]3 years ago
7 0

Answer:

They can bike 7.2 miles in 30 minutes.

Step-by-step explanation:

2.4 * 3 = 7.2

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Answer:

  • The system of equations is x + y = 85 and 7/20x+2/5y=31
  • To eliminate the x-variable from the equations, you can multiply the equation with the fractions by 20 and multiply the other equation by -7.
  • B-She used 60 minutes for calling and 25 minutes for data.

Step-by-step explanation:

It is always a good idea to start by defining variables in such a problem. Here, we can let x represent the number of calling minutes, and y represent the number of data minutes. The the total number of minutes used is ...

  x + y = 85

The total of charges is the sum of the products of charge per minute and minutes used:

  7/20x + 2/5y = 31.00

We can eliminate the x-variable in these equations by multiplying the first by -7 and the second by 20, then adding the result.

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