1) A chord is 2cm from the centre of a circle. If the radius of the circle is 5cm, find the length of the chord?
2) If y varies directly as square root of (x + 1) and y = 6 when x = 3. Find x when y =9.
3) An interior angle of a regular polygon is 5 times each exterior angle. How many sides has the polygon?
4) When a number is subtracted from 2, the result equals 4 less than one-fifth of the number. Find the number?
5) Solve : (x-2) (x-3) = 12