exam Maths Puzzle Numerical Ability

Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart?

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exam Other Question
The difference between the squares of two consecutive odd numbers is 88. Find the numbers. I have another question:

How do I graph this rational function f(x)= 6/(x-6)^2

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