What is -7 2/7 + 6 5/7

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?