Find the surface area of a cone with radius 8 and slant height 6.

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Harry the hook has 7 1/3 pounds of cookie dough.she uses 3/5 of it to bake cookie. how much cookie dough does she use to make cookie?