Answer:
Option C
Step-by-step explanation:
Area of the composite figure = Sum of the areas of three rectangles given
= (3x)(x) + 4x + 3(3x)
= 3x² + 4x + 9x
= 3x² + 13x
Since, area of the figure = 82
Therefore, expression representing area of the figure is,
3x² + 13x = 82
Option (C) will be the answer.
Here, x is a variable.
And we can get the value of x by using quadratic formula.
