PLEASE HELP I NEED AN ANSWER TO THIS ASAP

What expression is equivalent to 1/2(2+3x-6)

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.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way