Solve the Problem by Setting Up and Solving a System

question 183

Multiple Choice

Solve the problem by setting up and solving a system of two linear equations in two variables. Chip downloaded 21 songs for his MP3 player for a total cost of $22.20. The songs from Muchmore Music cost $1.00 each, and the songs from iTunes cost $1.20 each. How many songs did Chip download from each service?

• A) 17 songs from Muchmore 4 songs from iTunes
• B) 16 songs from Muchmore 5 songs from iTunes
• C) 18 songs from Muchmore 3 songs from iTunes
• D) 15 songs from Muchmore 6 songs from iTunes
• E) 19 songs from Muchmore 2 songs from iTunes

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Definitions:

Involuntary Responses

Reflex actions that occur without conscious control, such as breathing, blinking, or the heartbeat.

Reaction Times

The duration of time taken to respond to a stimulus, often used to measure the speed of nervous system processing.

Msec

Abbreviation for milliseconds, a unit of time equal to one thousandth of a second.

Reaction Time

The amount of time it takes to respond to a stimulus, critical in many aspects of human performance and safety.