we are supposed to explain
Which situation could be solved using the equation 
As we can see in the given equation , one number is -4 and the other number is 4
When we add two number of same value but opposite in sign we get zero.
This equivalent to the real life situation of paying a post paid bills.
Suppose you are using a post paid service , and the bills gets generated at the end of the month.
Suppose the bills amount is $x.
Once you pay that bills , then total outstanding again becomes $0.
Because 
Answer:
= 12 miles per hour
Step-by-step explanation:
thats the answer i promise plus im in 6th grade
The expression is
50h+25
50 times the number of hours, "h"
25 representing the one time service fee
Answer:
Train B is traveling faster.
Step-by-step explanation:
To find which train is faster, divide the distance the train traveled by the elapsed time for each train:
Train A:
Distance traveled is 12.5 meters.
Elapsed time is 1 second.
12.5 ÷ 1 = 12.5
Train A travels 12.5 meters per second.
Train B:
Distance traveled is 100 meters.
Elapsed time is 4 seconds.
100 ÷ 4 = 25
Train B travels 25 meters per second.
25 is greater than 12.5, so train B travels faster.
