Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?

Answer 1

The expression that represents the total perimeter of her sandwich is 2x + 2(x + 0.5) .

If x = 1.2, then the approximate length of the crust is:
2(1.2) + 2(1.2 + 0.5) = 2.4 + 2(1.7) = 2.4 + 3.4 = 5.8.

Therefore, the approximate length of the crust is 5.8 units.