Y=_x+_ what would be the answer

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?