Customers of a phone company can choose between two service plans for long distance calls. the first plan has no monthly fee but charges $ 0.17 for each minute of calls. the second plan has an $ 18 monthly fee and charges an additional $ 0.12 for each minute of calls. for how many minutes of calls will the costs of the two plans be equal?

0.17x = 0.12x +18

subtract 0.12x from each side

0.05x = 18

divide both sides by 0.05

x = 18/0.05 = 360

 360 minutes would be the answer

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54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m