If x+y=10 and x-y=4,find the value of x*x-y*y

Find the solutions for a triangle with a =16, c =12, and b = 63º

Which letters from the table represent like terms? a and b b and c a and d b and d

36x2 + 49y2 = 1,764 the foci are located at: a) (-√13, 0) and (√13,0) b) (0, -√13) and (0,√13) c) (-1, 0) and (1, 0)