Answer:
-657
Step-by-step explanation:

Substituting the value of a and b

The value of 3a²-4ab-26² is -657
Answer: square y cubed
Step-by-step explanation:
8 out of the 12 tiles are blue, right? The blue tiles are 8/12 of the whole mosaic. Divide the top and bottom by 4 to get 2/3
If I read this right, the answer should be

.
Hope that helped!!
The measure of the exterior angle is equal to the sum of the remote interior angles. Overall the sum of all the angles of a triangle is 180 degrees.
As given in the question,
Two remote interior angles measure = 
Hence, the exterior angle will be 99°
Option B is correct- The exterior angle measures 99˚.