exam Maths Puzzle Numerical Ability

Here is the question:
Area of a sail:
A triangular sail has an area of x2 + 5x + 6 square meters and a height of x + 3 meters. Find the length of the sails base.

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exam Other Question

I need to know the radius and center for this equation. It is for circles.
x^2-6x+y^2=226/25. Can you provide me some assistance on this problem...instructions...if the sales tax is 2.5% and the tax on purchase is $5, what was the amount of the purchase?