Hi,

im doing test revision. Could someone take me through the steps to solving these two questions, the actuall answers and working isnt important, these are just random questions on a revision sheet and having left my notes at uni i have nothing to look at to help me.

The plane 3x-y+z=0 passes through the origin. Find the reflection, in this plane, of the point P(4,-3,0)

and

Calculate the perpendicular distance between the planes r.(4i-3j+k)=10 and 4x-3y+z=8

thank you very much for your time!