Answer:

Step-by-step explanation:
Given

Now we know that system has infinite solution for x

in above equation.

∴
Answer: a standard door is about 2-2.10 meters
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Money lost. Keyword "lost". Ages, people, and height can't be negative. ( I guess people can be negative mentally but not physically)
Answer:
i thinks its -9
Step-by-step explanation: