Answer:
there are 15 birds all together and 5 black birds on the tree.
Step-by-step explanation:
Answer: 5
use formula a^2 + b^2 = c^2
a^2 + 12^2 = 13^2
a^2 + 144 = 169
- 144 -144
a^2 = 25
sqrt sqrt
a = sqrt (25)
a = 5
b
The slope is positive because as the age increases, the value increases.
