There are two couches against a wall. one takes up 4/9 of the wall and the other takes up 1/5 of the wall. how much of the wall is covered by couches.

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

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.