Question

Samual bought 6 notebooks for $9. At this rate, how much will he spend on 11 notebooks?

Answer 1

The cost of 11 notebooks is `$16.50`.

Explanation:

Calculate the cost of each of the 6 notebooks by dividing the total cost by the number of notebooks.

`("$9.00")/("6 notebooks")="$1.50/notebook"`

The cost of each notebook is $1.50.

Now multiply the cost of each notebook by the total number of notebooks to find the cost of 11 notebooks.

`11 color(white)(.)cancel"notebooks"xx"$1.50"/cancel"notebook"="$16.50"`

The cost of 11 notebooks is `$16.50`.