Abox contains 6 red marbles ,4green marbles , 3 blue marbles and 2 yellow marbles .if one marble is chosen at random what is the probality that it will be blue?

Solve the formula ax+ by = c for x.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site