Question

The Following system of equations can be used to find the price of a notebook in dollars. n and the price of a pencil in dollars p 7n + 4p =6.40 2n +19p = 5.40

Answer 1

The price of a notebook is $0.8 and the price of a pencil is $0.2

Explanation:

Let

n ---> the price of a notebook

p ---> the price of a pencil

we have

`7n+4p=6.40` ----> equation A

`2n+19p=5.40` ----> equation B

Solve the system of equations by graphing

The solution is the intersection point both graphs

using a graphing tool

The solution is the point (0.8,0.2)

see the attached figure

therefore

The price of a notebook is $0.8 and the price of a pencil is $0.2