Lnx+ln(2x)=1/e
can someone me solve this problem?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

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.