Answer: 
Step-by-step explanation:
By the Pythagorean theorem, the unknown side has length

Therefore,

Answer:
300????
Step-by-step explanation:
because you multiply 100 to the number of tens is equal 300 i think
Answer: 18
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
because it says between 4 and 8 and doesn't have a negative so its positive