9. The sales tax in one state is 5%. Write a function rule for finding the total cost of
an item with selling price x. Then find the total cost of a CD player with a selling
price of $110.
A f(x) = 1.05x; $115.50
B f(x) = x - 5; $108.95
C f(x) = 0.05x; $5.50
D f(x) = 5 + x;$111.05

seems like d

step-by-step explanation:

c

-by-step explanation:

it would be c

s

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be