Answer:
√15/3
Step-by-step explanation:
x² - y² =√5
(x +y)*(x -y) = √5
(x +y) * √3 = √5
x+y = √5 / √3
x +y = √5*√3 / √3*√3
x +y = √15/3
Cosine is

which applies to a right triangle. I hope that helps you.
Answer: None of the above
Step-by-step explanation:
Given


Now, integrating both sides



I would say c or d. but since its multiple choice, its ok to guess sometimes.
Answer:
2! Thank it if it was helpful :D
Step-by-step explanation:
7x-4x=3+3
3x=6
x=2