Vertical angles are congruent (equal in measure) and they have the same vertex point.
Step-by-step explanation:
1. Ampltiude is 1
The period is

is the period
The phase shift is 0
2. The Ampltiude is 2
The period is 2 pi
The phase shift is 1
3. The amplitude is 3
The period is 2 pi/3
The phase shift is -2
4.The amplitude is 2/3
The period is -10pi
The phase shift is 0
5. The Ampltiude is 1
The period is -2 pi
The phase shift is pi
6. The amplitude is 1/4
The period is -4pi
The phase shift is negative 2pi/3
7. The Ampltiude is 3
The period is 4
The phase shift is 8
Note the subtraction sign. Distribute the negative sign to all terms within the second equation.
6d + 5 - 2 +3d
Combine like terms
6d + 3d + 5 - 2
9d + 3
9d + 3 is your answer
Hope this helps
(-4)+10=6 if you add (-4) to 10
it is like subtracting 4 from 10
witch equals six