Answer:
The faster train goes 60mph
Step-by-step explanation:
s= speed
s+20 is the faster train.
Then you are given:
200/s+s+20=2
200=2*(2s+20)
4s+40=200
4s=160
s=40 is the slower train
40+20= speed of faster one
s=60 ;)
just search it up on the internet
A. 8y = -6
Add by going down, like you would add any large number.
x + 6y = 9
-x + 2y = -15
-----------------------
0 + 8y = -6
In words, you can think x - x = 0, 6y + 2y = 8y, and 9 - 15 = -6.
Put these all together, and you get 8y = -6
