Answer: The answer is B. Hope this helps :)
Step-by-step explanation:
Step-by-step explanation:
The sum of the interior angles of a triangle is equal to 180°. So from the figure, we can see that

Collecting all similar terms, we get

or

So the angle measures are now as follows:



Answer:
[-1, infinity)
Step-by-step explanation:
The graphs starts from X=1 and remains defined from X =1 to infinity. The domain of the function is, thus, [-1, infinity)
1 km = 1000 m
400 km = 400·1000 m = 400000 m
and
1 h = 3600 s
4 h = 4·3600 s = 14400 s
so the average speed: