3.8. as a simplified percent

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Which expression gives the area of the triangle shown below

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?