if 3% of all cars fail the emissions inspection find the probability that in a sample of 90 cars, 3 will fail. use the poussin approximation

Hi my sisters and brothers can tell me the answer because i don’t understand the question

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.

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10