How many solutions does the system of equations have

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.