Suppose $a$ and $b$ are integers. how many solutions are there to the equation $ab = 2a + 3b? $ plz

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?