The expression that represents the perimeter of the triangle is 5x - 2
<h3>Writing an expression </h3>
From the question, we are to write an expression that represents the perimeter of the triangle
From the given information,
"<em>The length of the base of the triangle is represented by x</em>"
and
"<em>The legs are 1 unit less than twice the length of the base</em>"
∴ One leg of the triangle = 2x - 1
The perimeter of a rectangle is the sum of all the sides
Thus,
Perimeter of the isosceles triangle = 2x - 1 + 2x - 1 + x
Perimeter of the isosceles triangle = 2x +2x + x - 1 - 1
Perimeter of the isosceles triangle = 5x - 2
Hence, the expression that represents the perimeter of the triangle is 5x - 2
Learn more on Writing an expression here: brainly.com/question/24382052
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