How do you know if two lines are parallel?

The nature park has a pride of 5 adult lions and 3 cubs. the adults eat 8 pounds of meat each day and the cubs eat 4 pounds. how much meat do the cubs and lions eat?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?