What’s the the answer to the question in the photo?

Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip.gasoline costs $1.05 per gallon.what was the cost of gasoline per mile driver?

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?