exam Maths Puzzle Numerical Ability

Use the distributive property to remove the parentheses in the following expression. Then simplify your result if possible.
3(x + 4)

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exam Other Question

2 cars leave for a destination 48km away. Car B going at a speed of 64km/hr started 12 minutes ahead of Car A which goes at a speed of 100 km/hr. How long will it take Car A to overtake Car B? I am not sure if you would use the foil method to answer this question or not.
(2x-y)*2. (*2 means squared)
I am confused on this question. I would really appreciate your help. Thanks