Holly's bike shop sells bicycles and tricycles. holly wants to know how many
bicycles she has in her store. she asks an employee to count for her. the
employee counts them and says, "there is a total of 15 bicycles and tricycles
in the store. the total number of wheels in the store is 36." how many
bicycles are in the store?

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

just sum

10 + 10 = 20

no

step-by-step explanation: