21% this is the exact answer i dont knw how to explain so ill just add charachters
Answer:
6.8
Step-by-step explanation:
In ΔVWX, the measure of ∠X=90°, the measure of ∠W=9°, and WX = 8.7 feet. Find the length of XV to the nearest tenth of a foot.
![-2m(m+n-4)+5(-2m+2n)+n(m+4n-5)](https://tex.z-dn.net/?f=-2m%28m%2Bn-4%29%2B5%28-2m%2B2n%29%2Bn%28m%2B4n-5%29)
![-2m^2-2mn+8m -10m+10n+mn+4n^2-5n](https://tex.z-dn.net/?f=-2m%5E2-2mn%2B8m%20%20-10m%2B10n%2Bmn%2B4n%5E2-5n)
Combine like terms.
![-2m^2-mn-2m+5n+4n^2](https://tex.z-dn.net/?f=-2m%5E2-mn-2m%2B5n%2B4n%5E2)
Simplify the expression from least to greatest.
![-2m^2 + 4n^2-mn-2m+5n](https://tex.z-dn.net/?f=-2m%5E2%20%2B%204n%5E2-mn-2m%2B5n)
is the answer.
For y = -x², the vertex = (0,0)