Describe the values of c for which the equation has no solution.
2x - 6 = 2x - c

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.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height