Question

Emma bought ff folders that cost $0.40 each and mm markers that cost $0.25 each. Sales tax is 5.25%. Which expression represents the total amount Emma paid, including tax?

Answer 1

We have that we can represent the total cost before taxation as follows:

`0.40f+0.25m`

However, we need to add the tax to each of the items. We have that this amount is the 5.25% of each item. Then, we have:

n% = n/100

`0.40f+(5.25)/(100)\cdot0.40f+0.25m+(5.25)/(100)\cdot0.25m`

Then, we can continue as follows:

`0.40f+0.0525\cdot0.40f+0.25m+0.0525\cdot0.25m`

And

`0.40f+0.25m+0.0525\cdot0.40f+0.0525\cdot0.25m`
`0.40f+0.25m+0.0525\cdot(0.40f+0.25m)`

Therefore, the correct option is the last option:

`0.40f+0.25m+0.0525\cdot(0.40f+0.25m)`