Answer:
Expression 8 • 24 represents the total area.
Option A is correct.
Step-by-step explanation:
Width of living room = 8 ft
Length of living room = 24 ft
We need to calculate area:
The formula used is: 
Putting values to get the expression

So, Expression 8 • 24 represents the total area.
Option A is correct.
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Step-by-step explanation:
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Substituting -3 for x, we have: (-3)^2-3*-3-7. This simplifies to 9+9-7, or 11.