Find the measures of the supplementary angles that satisfy each case. The measure of the first angle is 45° more than the measure of the second.

112.5 and 67.5

Step-by-step explanation:

x+45+x=180

2x+45=180

2x=135

x=67.5

67.5+45=112.5

112.5+67.5=180

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