Select all expressions that are equivalent to −4(+2)−2+4
1 answer:
You might be interested in
Answer:
<em>Speed of train A is 44 miles/hr.</em>
<em></em>
Step-by-step explanation:
Let the speed of train A =
Let the speed of train one =
Train A travels at the speed of train one.
i.e.
Distance traveled = 693 miles
Time taken = 7 hours
They are travelling in opposite directions so the resultant speed will appear to be faster.
Relative speed =
The trains are 693 miles apart in 7 hours that means they have traveled a total distance of 693 miles in 7 hours with a speed of () miles/hr.
Using the formula:
Putting the value of v using equation (1):
<em>Speed of train A is 44 miles/hr.</em>