Answer: 
<u>Step-by-step explanation:</u>
Given: cos x =
, x is in Quadrant 4
Use Pythagorean Theorem to find sin x:
8² + y² = 17²
y² = 17² - 8²
y² = 289 - 64
y² = 225
y = 15
→ sin x = 
Use the double angle formula to find cos (2x):

Answer:
(x + 6, y - 6).
Step-by-step explanation:
6 units to the right and 6 units down =
(x + 6, y - 6).
Answer:
y=2/3x+4/3
Step-by-step explanation:
Answer:
Step-by-step explanation:
Figure it out