im giving brainliest to whoever answers correct. i need the answer within an hour which is why im giving out so many points!

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

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.