there are 20 tiles in a bag. of these, 9 are purple, 5 are black and the rest are white.
event a = drawing a white tile on the first draw
event b = drawing a black tile on the second draw
if two tiles are drawn from the bag one after the other and not replaced, what is p(b|a) expressed in simplest form?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Find the missing dimension! need asap! tiny square is a =3025 in ²

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0