Which expressions are equivalent to the one below? check all that apply. 7^3*7^x
a.7^3+x
b.7^3-x
c.(7*x)^3
d.49^3
e.7^3x
f.343*7^x

(A) and (F)

Step-by-step explanation:

The given expression is:

We can solve the above given expression in different ways, such as:

can be written as

Also, can be written as:

=

=

Hence, options A and F are correct.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m