Which equation is an identity? a. i (x+i)=xi - 1
b. i(x-2i) = xi - 2
c. (4x-7)(4x+1)= 15
d. (3x + (3x +21) = 7x +91 ​

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.