exam Maths Puzzle Numerical Ability

Can someone help me solve this quadtratic problem:

2x2+7x+5

4+7x+5
9+7x

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exam Other Question

6-a/b over 24/b
this is a fraction - I came up with -a/4...not sure if this is right? An airplane flies 1,000 due east in 2 hours and 1,000 due south in 3 hours. What is the average speed of the airplane?
This is what I did:

((1,000/2)+(1,000/3))/2