exam Maths Puzzle Numerical Ability

Perform the indicated operations:
(5x2 - 3x + 2) + (-3x2 - 5x - 8) - (x2 + 3x - 10)

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exam Other Question

The equatiopn of a circle is x^2 + y^2 = 50. the region enclosed by the circle is also divided into two parts. find the area of the smaller one.

thnx! Trains at each end of the 50.0 km long Eurotunnel under the English Channel start at the same time into the tunnel. Find their speeds if the train from france travels 8.0km/h faster than the train from England and they pass in 17.0 min.