Angles A and B are supplementary. Angle A has a measure of 80°. What is the measure of angle B? The measure of angle B is °.

100°

Step-by-step explanation:

Supplementary angles equal 180° when added together.  

subtract 80° (angle A) from 180° (total sum of angles) and you get 100° (angle B)

hope this helps :)

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.