exam Maths Puzzle Numerical Ability

I trying to find out how to acomplish this problem:
It states to: Find the X^7 term in the Expansion of (X+Y)^11

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exam Other Question

Jim and Juan are going to drive their motorcycles from Gastonia to Charleston. Jim leaves at 8:00 am but Juan can not leave until 8:30 am. If Jim drives at 50 mph and Juan drives at 55 mph, at what time will Juan catch up with Jim? Find all (vertical and horizontal) asymptotes of f(x) = 2x^2 + 4x + 2 / 1-x^2. What is the domain of this function?