I failed this quiz even tho there were so MANY VERIFIED answers, the answer is 2.
Answer:
x = 4, -2
Step-by-step explanation:
split the absolute value into 2 equations:
|3x - 3| = 9
3x - 3 = 9 3x - 3 = -9
3x = 12 3x = -6
x = 4 x = -2
x = 4, -2
<h2>(-∞,∞) </h2>
Step-by-step explanation:
PART A:
given 

This is true for all values of x.
So,x∈
-∞,+∞
PART B:
When
,left hand side=
right hand side=
so,left hand side =right hand side
When
,left hand side=
right hand side=
so,left hand side =right hand side
When
,left hand side=
right hand side=
so,left hand side =right hand side
Answer:
There's no specific answer
Step-by-step explanation:
If you want the Midpoint M between A and B then you should use the equation 
Answer:
steps below
Step-by-step explanation:
Are you going to solve the value of A or just a proof the equation
cos 2A = cos² A - sin² A
2cos²A-cos2A-1 = 2cos²A - (cos² A - sin² A) - 1 = cos² A + sin² A - 1
2cos²A-cos2A-1 = 1 - 1 = 0
A: 90° or 270° or 450° .....