Someone give me answers asap!!

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

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.