Answer:
1) A KitKat Crispy bar
2) B4
3) Then the machine is broken
4) It could be a malfunction
5) No, someone messed up the stickers
6) Them the machine is working

where x is the estimated value and xr the real value

the percent error is 10.71%
Step-by-step explanation:
step 1. wow! 670° I think you mean 67°
step 2. the 3 internal angles of a triangle add up to 180°. let x be the third angle
step 3. x + 102 + 67 = 180
step 4. x + 169 = 180
step 5. x = 11°.
Ok
you do 3 X 6 and 3 X 6x first to get
8 - 18 -18x
8 and 18 are constant so 8-18 is 10
simplify and get 10-18x