Question

An online music club has a one-time registration fee of $13.95 and charges $0.49 to buy each song.(a) write an equation, c, for the total cost of song with s number of songs, then find the total for 15 songs

Answer 1

$C=13.95+0.49S$$\text{total cost for 15 songs=}21.3$

Explanation

Step 1

Let

C represents the total cost

S represents the number of songs

one -time registration fee means you dont have to pay this anymore, no matter how many songs you buy

charges for one song=0.49

charges for S songs=0.49*S

then

total cost= one-time registration fee plus 0.49 dollars per song

replacing

$C=13.95+0.49S$

I hope this helps you.

Step 2

the total cost for 15 songs

c(15), you have to replace 15 in the place of S

$\begin{gathered} C=13.95+0.49(15) \\ C=13.95+7.35 \\ C=21.3 \end{gathered}$

So, the cost of the 15 songs is $21.3