Factor the polynomial completely
3x³+21x

The answer to your question is     3x(x² + 7)

Step-by-step explanation:

Data

Polynomial     3x³ + 21x

Process

1.- Find the Greatest common factor of 3 and 21

                  3    21     3

                   1      7    7

                           1        

Greatest common factor = 3

2.- Find the Greatest common factor between x³ and x

                   x³    x    x

                   x²     1    x

                   x            x

                    1

Greatest common factor = x

3.- Factor

             3x(x² + 7)

gdp is the best phrase!

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