If i have 90 pies and bob takes 40 but billy gives me triple that how much candy do i have

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.

Find the domain and range of the following function f(x) = 51x - 21+ 4

The graph represents f(x)=[x]+3. what is f(-2.2)?