If f(x)=7x+2 and x=1 what is the output value? Plzzz help ASAP

What is the value of x? enter your answer in the box. photo attached.

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)