Elliot is building a sandbox in the shape of a triangle. A model of the sandbox is shown. Which expression represents the perimeter of Elliot's sandbox? (1 point) Responses 3x+10 3 x plus 10 3x−2 3 x minus 2 x+10 x plus 10 x+11

Answer 1

The perimeter of a triangle is the sum of the lengths of its sides.

Looking at the model of the sandbox, we can see that there are three sides: one side of length x, another side of length x+10, and the last side of length x+11.

To find the perimeter, we add up the lengths of these three sides: x + (x+10) + (x+11).

So, the expression that represents the perimeter of Elliot's sandbox is: 3x + 21.