What the range if the domain is [-2,0,2]?

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Step-by-step explanation:

1. Let's just focus on one person at the moment. One of the friends bought a single shirt for $20, and 4 shirts that cost x dollars. Therefore, a single person's expense can be shown as:

Where x is the number of shirts the person bought.

Each of the three friends had the exact same expenses too, so we multiply this by three:

2. Simplifying the above equation just means multiplying each term in the parentheses by the 3 outside it, so 3 times 20 is 60, and 4x time 3 is 12x. Therefore, the simplified expression is:

Hope this helps!