407,333 views
29 votes
29 votes
I got it wrong on my quiz, my exam is tomorrow and id like help understanding it.

I got it wrong on my quiz, my exam is tomorrow and id like help understanding it.-example-1
User Wswld
by
2.9k points

1 Answer

8 votes
8 votes

The perimeter of the sandwich is the sum of all its sides, then we have:


2x^2+8+2x^2+8+2x^2+9+2x^2+9=8x^2+34

Therefore the perimeter is:


8x^2+34

The length of the crust is the same as the perimeter of the sandwich; if x=1.2 we have that:


8(1.2)^2+34=45.52

Therefore the length of the crust is 45.52

User Benjamin Telkamp
by
2.9k points