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1 answer:
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Perimeter of the triangle ABC is 18.7 units.
Coordinate of the point A is (4, -1), B is (-1, 4) and C is (0, -3).
Length of the side AB =
AB =
AB = 7.07 units = 7.1 units ( rounded to the nearest 10th)
Length of the side BC =
BC =
BC =
BC = 7.07 units = 7.1 units ( rounded to the nearest 10th)
Length of the side CA =
CA =
CA =
CA = 4.47 units = 4.5 ( rounded to the nearest 10th)
Perimeter of the triangle ABC = sum of all three sides = (7.1 + 7.1 + 4.5) units = 18.7 units
ANSWER
First choice
EXPLANATION
The graph of f(x) and
are symmetric about the line y=x.
This means that the graph of
is the reflection of f(x) in the line y=x.
This explains why the composition of a function and its inverse yields x, as the result.
The first choice is correct.