The expression that represent Cindy's bill for m packs of ballpoint pens and n composition books for 5% discount given that 12 packs of ballpoint pens for $1.09 each and composition books for $2.79 each is ($1.09m+$2.79n)0.95%. This can be obtained by calculating total price of items and reducing 5% as discount.
What is the formula of discount?
The formula for discount is,
- Selling price = Marked price (100% - Discount%)
What is the required expression?
Given that, cost of 1 pack of ballpoint pens = $1.09
cost of 1 composition book = $2.79
cost of m pack of ballpoint pens = $1.09m
cost of n composition books = $2.79n
Total cost = $1.09m + $2.79n
Discount% = 5%
By formula of discount,
price after discount = ($1.09m + $2.79n)(100% - 5%)
= ($1.09m + $2.79n)95%
= ($1.09m + $2.79n)0.95%
Hence the expression that represent Cindy's bill for m packs of ballpoint pens and n composition books for 5% discount given that 12 packs of ballpoint pens for $1.09 each and composition books for $2.79 each is ($1.09m+$2.79n)0.95%.
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