If f(x) = -
2x
+4, which of the following is the inverse of f(x)?
O A. f-1(x) = 2(x+4)
O
B. f-1(x) = 7(x-4)
2
O c. f-1(x) =
2(x-4)
7
O D. f-1(x) = 7(x+4)
2

You have 37 coins that are nickels, dimes, and pennies. the total value of the coins is $1.55. there are twice as many pennies as dimes. find the number of each type of coin in the bank.