exam Maths Puzzle Numerical Ability

need help - want to make sure i did these correct!
Need standard form for the following (ellipses)
1. 3x^2-6x+y^2+8y-8=0
2. 4x^2-8x+5y^2-20y-4=0
ALSO
need vertices a

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For the following set of data, test the hypothesis that the average is 10. Run a test of that hypothesis and present the conclusion.
x
8.9
9.7
10.3
8.5
10.4
9.3
9.8
7.1
10.6
11.1 A plane travels 1800 miles against a headwind in 4 hours. The return trip, now with a tailwind, takes an hour less. What is the rate of speed of the wind?