A retired couple invested part of $13,000 at 6% interest and the rest at 7.5%. If their annual income from these investments is $861, how much was invested at each rate?

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Does anyone know how to do geometryme with this problem

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180