Answer:
positive is the correct answer
take the absolute value of the coefficient (2)
then the lower bound is the negative of that (-2)
so the range is [-2,2]
180-129= 51
angle 4 is equal to angle 12 so missing angle 12= 51°
<u>Answer:</u>
or 
<u>Step-by-step explanation:</u>
We are given the following function of x and we are to find the value of
:

Substituting the given value (7) in the above function to get:





or 