Which ordered pairs lie on the graph of the exponential f(x)=-3To the second power X +5

For what value of x does 4x = (1/8) x + 5?

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?