Becky has already run 23 miles on her own, and she expects to run 1 mile during each
track practice. How many miles would Becky have run after 19 track practices?

42

Step-by-step explanation:

Since Becky already ran 23 miles, and there is 1 mile per track practice, you add the 19 and 23 to get your answer.

47

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.