Select the number property that will justify the step in the following expression.

6 + (14 + 70) =
(6 + 14) + 70 = transitiveidentity - additionassociative - additioncommutative - addition
20 + 70 = 90

3

step-by-step explanation:

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