There are 30 students on the debate team and 20 students on the math team. ten students are on both the math team and debate team. what is the total number of students on either team

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Through non-collinear points there is exactly one plane.