If the train travels 18 mph you just have to divide 270 by 18 and that would be your answer.
So 270/18 = 15 which means it would take the train 15 hours to travel 270 miles.
The same reason 4 dimes and 4 pennies aren't equal.
To put it into decimal terms, 4/10 is 0.40 (or forty cents), whereas 4/100 is 0.04 (or four cents)
Y - y₁ = m(x - x₁)
y - 2 = -3(x - (-5))
y - 2 = -3(x + 5)
y - 2 = -3(x) - 3(5)
y - 2 = -3x - 15
<u> + 2 + 2</u>
y = -3x - 13
