51, because 39+12=51. You just add both parts of the tree. Please Rate Brainliest.
Answer:
A
Step-by-step explanation:
x^2 + 7x+ 10. factors out to (x - 2)(x + 5)
Answer:
B. y + z = x
Step-by-step explanation:
x is an exterior angle of the triangle.
y and z are the opposite angles opposite the exterior angle.
The exterior angle theorem of a triangle states that the measure of an exterior angle equals the measure of the sum of the two angles opposite the exterior angle.
Thus:
y + z = x
Answer:
they are identical. proved below.
Step-by-step explanation:
- formula:
![sin(t)+sin(s) = 2sin(\frac{t+s}{2} )cos(\frac{t-s}{2} )](https://tex.z-dn.net/?f=sin%28t%29%2Bsin%28s%29%20%3D%202sin%28%5Cfrac%7Bt%2Bs%7D%7B2%7D%20%29cos%28%5Cfrac%7Bt-s%7D%7B2%7D%20%29)
using the formula to proof:
![sin9a+sin5a](https://tex.z-dn.net/?f=sin9a%2Bsin5a)
![2sin(\frac{9+5}{2})* cos(\frac{9-5}{2})](https://tex.z-dn.net/?f=2sin%28%5Cfrac%7B9%2B5%7D%7B2%7D%29%2A%20cos%28%5Cfrac%7B9-5%7D%7B2%7D%29)
![2sin7a * cos2a](https://tex.z-dn.net/?f=2sin7a%20%2A%20cos2a)
True. proved that they are identical.
Answer:
25
Step-by-step explanation: