first question is true and second question is 6cm
No. We claim that
![1=0.\overline{9}](https://tex.z-dn.net/?f=1%3D0.%5Coverline%7B9%7D)
and use algebra to prove the statement.
Let
![x=0.\overline{9}](https://tex.z-dn.net/?f=x%3D0.%5Coverline%7B9%7D)
. Multiply this by ten to get
![10x=9.\overline{9}](https://tex.z-dn.net/?f=10x%3D9.%5Coverline%7B9%7D)
. Subtract the initial equation to give
![9x=9](https://tex.z-dn.net/?f=9x%3D9)
and divide by
![9](https://tex.z-dn.net/?f=9)
to see that
![x=1](https://tex.z-dn.net/?f=x%3D1)
. Substituting into the original equation gives
![1=0.\overline{9}](https://tex.z-dn.net/?f=1%3D0.%5Coverline%7B9%7D)
, proving the desired statement.
The answer is 74. The parenthesis is another way of telling you to multiply.
Try this first :) Let me know what you come up with :)
Answer:
X=5
Y=3
(5,3)
Step-by-step explanation:
Solve using substitution