Plz help I’ll mark brainliest it’s a retake and I need help fast

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

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)