Question # 1
Answer:

Step-by-step explanation:
Given the expression

∵ 
∵ 








Therefore,

Question # 2
Answer:

Step-by-step explanation:
Given

∵ 
∵ 










Therefore,

Answer:
500 cm
Step-by-step explanation:
100 cm is equal to 1 meter. *5 is 5 meters or 500 cm
Sorry if I'm wrong. I don't think I am but there is always a possibility
Answer:
I think it's C, because the figures are similar by THAT statement
Answer: x=7
Step-by-step explanation:
3x=21
21 divided by 3 is 7
so x equals 7