Question

Math question down below

Answer 1

The total cost, 'C' is the sum of the cost of the notebooks, 'n' and the cost of the pencils. 'p':

`C=n+p`

The notebooks cost $2.55 each so for 4 notebooks we have:

`n=4 * \$2.55`

The cases of pencils cost $1.99 each so for 3 cases we have:

`p=3 * $1.99`

Substituting into our main equation we have:

`C=n+p`

`C=4(2.55)+3(1.99)`

`C=10.20+5.97`

`C=16.17`

Now that we know the total cost we can find the amount of change by subtraction from the total amount she has:

`Change=Total-Cost`

`Change=\$20.00-\$16.17`

`Change=\$3.83`