Your grandmother called and asked you to come over. you rode your bike 15.25 miles in 30 minutes. how many miles per hour did you travel?

since 30 minutes is 1/2 of an hour

multiply 15.25 x 2 = 30.5 miles per hour

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