One-half of a number decreased by two-thirds is two less than one-fifth of the number. Find the number.

n = -40/9

Step-by-step explanation:

Let n = the number

(1/2)n - 2/3 = (1/5)n - 2

Multiply both sides by 30, which will get rid of the fractions.

15n  - 20 = 6n - 60

9n = -40

n= -40/9

Hope this helps.

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