Which expressions are equivalent to j+j+2kj+j+2kj, plus, j, plus, 2, k ?

4j + 4kj + 2k

Step-by-step explanation:

j + j + 2kj + j + 2kj + j + 2k

j + j + j + j + 2kj + 2kj + 2k

4j + 4kj + 2k

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

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