Question

A used electronics store pays $50 for each cell phone, spends $15 refurbishing the phone, and sells the refurbished phone to a customer for $120.

a. Write an expression in simplest form that represents the company's earnings (in dollars) from buying, processing, and selling cell phones. Use x to represent the number of cell phones they sell.


An expression is ( ) dollars.



Question 2

b. What does the coefficient of the expression in part (a) represent?


- the total number of phones the company sells


- the amount (in dollars) the customer loses from each phone


- the amount (in dollars) the company earns from each phone


- the amount (in dollars) the company spends on each phone

Answer 1

Part (A): The required expression is
`55x`.

Part (B): The correct option is C) the amount (in dollars) the company earns from each phone.

Explanation:

Consider the provided information.

A used electronics store pays $50 for each cell phone, spends $15 refurbishing the phone, and sells the refurbished phone to a customer for $120.

Let x to represent the number of cell phones they sell.

Part (A)

For x cell phones store will pay $50x. Also store will spend $15x to refurbishing.

We will use negative sign for pay and spend money, Also use positive sign for selling amount.

Therefore the required expression is:

Company's earnings =
`-50x-15x+120x`

Simplify the expression as shown.

`55x`

Hence, the required expression is
`55x` dollar

Part (B) What does the coefficient of the expression in part (a) represent?

The coefficient of the expression is the amount (in dollars) the company earns from each phone.

Hence, the correct option is C) the amount (in dollars) the company earns from each phone.