Sandy programmed a website's checkout process with an equation to calculate the amount customers will be charged when they download songs. The website offers a discount. If one song is bought at the full price of $1.29, then each additional song is $.99. State an equation that represents the cost, s, when c songs are downloaded.

Question

Mathematics

Shawn Bishop

4 February, 07:07

Sandy programmed a website's checkout process with an equation to calculate the amount customers will be charged when they download songs. The website offers a discount. If one song is bought at the full price of $1.29, then each additional song is $.99. State an equation that represents the cost, s, when c songs are downloaded.

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Mike Chung · Answer 1

if one customer shows up, and she buys one song, that's $1.29, if she doesn't buy anymore, then that's the charge.

the first song is always at a full price, and after that, to encourage buying, the next ones are just 99 cents, let's see how it goes after a few songs purchases.

1 song ... $1.29

2 songs ... $1.29 + 0.99 (2)

3 songs ... $1.29 + 0.99 (3)

4 songs ... $1.29 + 0.99 (4)

c songs ... $1.29 + 0.99 (c)

s (c) = 1.29 + 0.99c.