Answer:
He began with 14 please mark brainliest
Step-by-step explanation:
13-6 equals 7
7 times 2 equals 14
360 / 20 = <span>18°
i don't know if that is right</span>
Answer:
The answer is 6. Does that help?
His average speed for the first trip is 43 mph
Since Brian's average speed is x and he travels the first part for 215 miles in time t.
So, his distance d = xt
Also, the travels 75 more miles at a speed of 15 mph.
Since distance = speed time, the time he takes to cover this distance is
t' = distance/speed = 75 mi/15 mph = 5 hours
Since he covers both distances in the same time, we have that t = t' = 5 hours.
So, his average speed for the first trip x = d/t
= 215 mi/5 h
= 43 mph
His average speed for the first trip is 43 mph
Learn more about average speed here:
brainly.com/question/13605708
Answer:
36
Step-by-step explanation:
(1/2)(3+5)(9)
(1/2)(8)(9)
(4)(9)
36