51, because 39+12=51. You just add both parts of the tree. Please Rate Brainliest.
Answer:
97.68 %
z(lower) = .0227
z(upper) = .999
Step-by-step explanation:
Answer:
4
+2
Step-by-step explanation:

=
×
=
=6
+ 6 -
- 
=6
+ 6 - 4 - 
=6
+ 2 - 
=6
+ 2 - 2
=4
+2
for
= 2
,
= 
= (
)^2 ×
=2 ×
Ok this is the answer to this question 2(x+1)