Please i need help asap

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

If f(x)=3 over x+2 - square root x-3 then f(7)=

The oates family went out for dinner the price of the meal was $33.95 the sales tax was 7.25% of the price of the meal . the tip was 15% of the meal and the sales tax . how much money did the oates family pay for the meal, including tax and tip