I need help ASAP please help

What is the measure of the smallest angle in the diagram? 15 29 32 45

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?