I need help finding unknown angle measures. Please help picture of problem is here.

x=30 , <HFC= 120 , <DBG=60

Step-by-step explanation:

First when I take a look at these types of problems I always make sure to look around and see if there is anything that can help me.

A very key thing to remember is that all angles that are on a line will = 180

So looking at the angles and just normal geometry rules you can know that 2x+4x=180 cause the inner angles add up to 180.

So then if 6x=180 then divide by 6 to get 30 for finding x!

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.