Answer:
x = -3
Step-by-step explanation:
3x + 9 = 12x + 36 (rewrite)
3x - 12x + 9 = 36 ------> 3x - 12x = 36 - 9
3x - 12x = 36 - 9 (collect like terms)
-9x = 36 - 9 ( substract)
-9x = 27 (divide both sides for the answer)
-9 -9
x = -3
Answer:
A, B, D, and i think F
Step-by-step explanation:
im not sure of F, though.
The exact value of sin(7π12) sin ( 7 π 12 ) is √2+√64 2 + 6 4 .
For this case what we should do is take into account the following vectors:

We must find the following subtraction of vectors:

Subtracting component to component we have:

By writing we have:

Then the module of the resulting vector is given by:

Rewriting we have:

Answer:
The module of the resulting vector is given by:

option B