Help me please and thank you please explain so I can make sure your right and understand :)

7 and 21

Step-by-step explanation:

If the points are arranged BAC, the distance BC is BA+AC = 12 +19 = 31.

If the points are arranged ABC, the distance BC is AC-AB = 19 -12 = 7.

im only in middle school but I’m positive I’m 100% right

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol