How many is x - 87 = 13 just answer pls
2 answers:
You might be interested in
Answer:
The car was travelling at a speed of 60 miles per hour.
Step-by-step explanation:
Given:
Distance traveled = 330 miles
Time Period =
we need to find the speed of the car .
Solution:
Time Period =
Now we can say that;
So Time period =
Now we know that;
Distance traveled is equal to Speed
multiplied by Time Period
.
framing in equation form we get;
Dividing both side by 5.5 we get;
Hence The car was travelling at a speed of 60 miles per hour.
Answer: 20 mph
Explanation:
Speed is a physical quantity which is equal to the ratio between the distance covered (d) and the time taken (t):
In the first part of the problem, the plane flew a distance of d=400 mi in a time of t=2.5 h. The speed of the plane in this case was the difference between the proper speed of the plane, v, and the speed of the wind, w, since the plane flew opposite to the wind. So we can write:
(1)
During the return trip, the plane flew with a speed (v+w), since the wind was on the tail, and it took 2 hours to cover the same distance:
(2)
So we have two equations with two unknown variables. From (1), we get
Substituting into eq.(2)
So, the speed of the wind was 20 mph.