Y varies directly as x. Find the constant variation k and write the equation that relates the two variables.
Y=2/3 when x=1/2?

2x minus y equals 6, x plus y equals negative 3

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.