Solve for x Please help me ASAP

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

You love to play soccer! you make a shot at the net 8 times during a game! of those 8 attempts, you score twice. what percent of the time did you score?