What is the image of (-6,-4) after a reflection over the line y=x?

The rule for a reflection in the line y = x is (x,y) --> (y,x)

so  (-6,-4) > (-4 , -6)

Answer

(-4 , -6)

what is a pre-existing condition claus?

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads