Question

An online electronics 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? (1 point)
(20)(35) + (15)(15) + 125
(20)(15) + (15)(35) + 125
(20)(35) + (15)(15) − 125
(20)(15) + (15)(35) − 125

Part B: Explain why your answer to Part A is correct. (1 point)

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

Answer 1

(20)(35) + (15)(15) - 125

This is right because the store bought 20 keyboards and sold each one for 35 dollars, and bought 15 phone chargers and sold each one for 15 dollars. so, 20 x 35 = 700 and 15 x 15 = 225. We use - 125 because we used that money to buy the products, so we need to subtract that out of the profit we are going to get.  700 - 225 = 925. Now we subtract the money we used, 925 - 125 = 800. The profit they gained was 800 dollars!