The johnson twins were born twelve years after their older sister. this year, the product of the three siblings' ages is exactly 1663 more than the sum of their ages. how old are the twins?

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?