Asmall sofa has a mass of 30 kilograms. a pillow on the sofa has a mass of 300 grams. how many pillows would it take to equal the mass of the sofa?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

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.