Step-by-step explanation:
everything can be found in the picture
Answer:
Step-by-step explanation:
the first one
<u>Answer:</u>
A = 70
B = 90
<u>Step-by-step explanation:</u>
We know that Car A travels 20 mph faster than Car B.
Assuming the speed of Car B to be x and the speed of Car A to be x+20, we can write:

Taking the reciprocal of both sides to make x the subject:




---> speed of Car A
Finding the speed of Car B: 
Therefore, the speed of Car A = 70 and the speed of Car B = 90.
The answer to your question is
0.176470588
Speed= distance/time.
6.4/4.
1.6 meters per minute.