Question

An electronic store bought 20 keyboards and 15 phone chargers for $125 and then sold each keyboard for $35 and each phone charger for $15.

Part A: Which expression represents the amount of money the store made?
(Expressions shown in picture)

Part B: Explain why your answer to Part A is correct.

Part C: What is the value of the expression you chose in part A? Show each step of your work.

Answer 1

The store made $925 by selling 20 keyboards at $35 each and 15 phone chargers at $15 each, which is calculated using the expression (20 × $35) + (15 × $15).

Part A: Expression Representing the Money Made by the Store

The expression representing the amount of money the store made is:

(20 × $35) + (15 × $15)

Part B: Explanation

The reason this expression is correct is because it calculates the total revenue from selling the items. For the keyboards, the store sells 20 at $35 each, and for the phone chargers, the store sells 15 at $15 each. These two amounts are then added together to give the total revenue.

Part C: Value of the Expression

Calculating the value of the chosen expression:

For keyboards: 20 × $35 = $700

For phone chargers: 15 × $15 = $225

Total revenue: $700 + $225 = $925

Therefore, the value of the expression is $925.