Guys how does it just jump to 15? what goes in between

2

step-by-step explanation:

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

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)