my teacher isnt teaching well i need help learning how to do this. please include steps if possible. thank u :)

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?