In 144 minutes, or at 5:19 pm, the trains will arrive at the same time again.
Answer:
1.f 2.a 3.j 4.e
Step-by-step explanation:
you add and subtract the needed like terms
for example you can add 3x with 4x but not with 4x² because it's a different degree
1 stone = 20 square inches
1 stone * 30 = 20 square inches * 30
30 stones = 600 square inches