A hardware store chain sells hammers for $3, flashlights for $5, and lanterns for $7. The store manager tracks the daily purchases at three of the chain's stores in a 3 X 3 matrix. What is the total gross revenue from the flashlights sold at all three stores?

Question

anonymous · Answer

|dw:1368035971557:dw|

anonymous · Answer

@RoseDryer Do you know how to do this?

anonymous · Answer

Is that the matrix shown above one they gave you?

anonymous · Answer

Yes

anonymous · Answer

Then below that it says:
How can you use matrix multiplication to solve this problem?
What does the product matrix represent?
@RoseDryer

anonymous · Answer

Okay just a sec. Let me work it out.

anonymous · Answer

Ok