Answer:
Second Option

Step-by-step explanation:
To simplify the expression you must multiply the numerator and the denominator of the fraction by the conjugate of the denominator.
If you have an expression of the form
then its conjugate will be 
The result of that multiplication will be

Therefore we have the expression

By multiplying by the conjugate of the denominator we have

Answer:
5
Step-by-step explanation:
use the Pythagorean theorem
Answer:
huh
Step-by-step explanation:
Answer:
For the second image the answer is 1.2
Step-by-step explanation:
The others won’t load in ;-;
Answer:
15 5mg tablets
Step-by-step explanation:
The dog needs 7.5 mg a pound. He weighs 10 lbs so multiply 7.5 by 10. You get 75 so divide it by 5. Answer is 15