Add the mixed numbers by finding the common denominator. three and three fourths plus two and one third equals blank

six and three twelfths
six and one twelve
five and four sevenths
five and one twelve

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?

Tom and lilly rented a house for $12,000 last year. at the start of the year they bought the house they had been renting directly from the owner for $250,000. they believe they could rent it for $12,000 this year, but stay in the house. how much does tom and lilly’s decision to buy the house change gdp? a. it reduces gdp by $12,000 b. it does not change gdp c. it raises gdp by $238,000 d. it raises gdp by $250,000