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Anestetic [448]
3 years ago
15

Barbara buys a box of pens for $4. For every additional box she buys, she gets a $1 discount. Which expression represents the to

tal cost of the pens, c, as a function of the number of boxes, b?
A. c=f(b)=4b-1
B. c=f(b)=4b+1
C. c=f(b)=3b+4
D. c=f(b)=4b+3
E. c=f(b)=4+3(b-1)
Mathematics
2 answers:
Daniel [21]3 years ago
5 0

Answer:

the answer is E !!!!!!!!!!!!!!!!!!!   ; )


Alla [95]3 years ago
5 0

Answer:

E. c(b)=4+3(b-1)

Step-by-step explanation:

Let b represent the number of boxes.

We have been given that Barbara buys a box of pens for $4, so the cost of 1st box will be $4.

Now the number of boxes without 1st box will be b-1.

We are also told that for every additional box she buys, she gets a $1 discount, so the cost of b boxes without 1st box will be 3(b-1).

The total cost of all the boxes will be cost of 1st box plus cost of b boxes.

\text{Total cost of boxes}=4+3(b-1)

Since we need to represent the total cost of the pens, c, as a function of the number of boxes (b), so our function will be:

c(b)=4+3(b-1)

Therefore, our required function is c(b)=4+3(b-1) and option E is the correct choice.

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