So if point W is somewhere on the line segment UV, then the equation UV = UW + WV is true.
![UV = UW + WV\\(13)=(2y-9)+(y-5)\\13=2y-9+y-5\\13=(2y+y)+[(-9)+(-5)]\\13=3y-14\\27=3y\\\\y=9](https://tex.z-dn.net/?f=UV%20%3D%20UW%20%2B%20WV%5C%5C%2813%29%3D%282y-9%29%2B%28y-5%29%5C%5C13%3D2y-9%2By-5%5C%5C13%3D%282y%2By%29%2B%5B%28-9%29%2B%28-5%29%5D%5C%5C13%3D3y-14%5C%5C27%3D3y%5C%5C%5C%5Cy%3D9)
How many numbers are there between 1 and 1000 that dont include the digit 9
1 answer:
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