Ling JM is also 23 centimeters because line LJ and JM are a line but broken into two segments
Your answer: -0.8
first you would add all of your temperatures together which would give you -5.6
then you would divide -5.6 by 7 because u have 7 numbers
which would give you your answer!
hope this helps, good luck!
Tan 34 = 12/x and then uhm, put 12/tan34 into ur calculator