Abox contains 7 red marbles 4 white marbles, and 5 blue marbles. If only white marbles are added to the box how many must be added to make the probability of drawing a white marble

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl