4. a circle has its centre at the origin and passes through the points p(-1,13) and q(11, k). if point q is
in the first quadrant:
a) determine the value of k'.
b) determine the equation of the perpendicular bisector of pq. show that it passes through the
centre of the circle.

Which expression is the factored from of 2/3x + 4?asap

The circumference of a circle is 5 pi cm. what is the area of the circle?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.