Answer the question that is in the picture

The sum of two numbers is 12 and their difference is 18 what are the two numbers

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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.