What number line represents the solution set for the inequality 3x < –9?

The solution set of the given inequality is:

                         (-∞,-3)

We are given a inequality in terms of the variable x by:

We divide both side of the inequality by 3 to obtain the new expression as:

This means that the graph of such a inequality is the set of all the real value which are strictly less than -3( since the inequality is strict)

Hence, the solution set in set-Builder form is:

   ={all x belonging to real numbers| x<-3}

and in interval form the solution is: (-∞,-3)

72 is the answer to this problem

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