Answer:
x = 15
Step-by-step explanation:
2x+10+4x+80=180
or, 2x+4x=180-80-10
or, 6x=90
or, x=15
Answered by GAUTHMATH
Answer:
![\boxed{2\pm \frac{\sqrt{2}}{2}}](https://tex.z-dn.net/?f=%5Cboxed%7B2%5Cpm%20%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%7D)
Step-by-step explanation:
![2x^2-8x=-7](https://tex.z-dn.net/?f=2x%5E2-8x%3D-7)
![\sf Add \ 7 \ on \ both \ sides}.](https://tex.z-dn.net/?f=%5Csf%20Add%20%5C%207%20%5C%20on%20%5C%20both%20%5C%20sides%7D.)
![2x^2-8x+7=-7+7](https://tex.z-dn.net/?f=2x%5E2-8x%2B7%3D-7%2B7)
![2x^2-8x+7=0](https://tex.z-dn.net/?f=2x%5E2-8x%2B7%3D0)
![ax^2 +bx+c=0](https://tex.z-dn.net/?f=ax%5E2%20%2Bbx%2Bc%3D0)
![\sf Apply \ quadratic \ formula.](https://tex.z-dn.net/?f=%5Csf%20Apply%20%5C%20quadratic%20%5C%20formula.)
![a=2 \ \ \ b=-8 \ \ \ c = 7](https://tex.z-dn.net/?f=a%3D2%20%5C%20%5C%20%5C%20%20b%3D-8%20%5C%20%5C%20%5C%20c%20%3D%207)
![x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
![x=\frac{-(-8)\pm\sqrt{(-8)^2-4(2)(7)}}{2(2)}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%28-8%29%5Cpm%5Csqrt%7B%28-8%29%5E2-4%282%29%287%29%7D%7D%7B2%282%29%7D)
![x=\frac{8\pm\sqrt{64-56}}{4}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B8%5Cpm%5Csqrt%7B64-56%7D%7D%7B4%7D)
![x=\frac{8\pm\sqrt{8}}{4}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B8%5Cpm%5Csqrt%7B8%7D%7D%7B4%7D)
![x=\frac{8\pm2\sqrt{2}}{4}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B8%5Cpm2%5Csqrt%7B2%7D%7D%7B4%7D)
![x=2\pm \frac{\sqrt{2}}{2}](https://tex.z-dn.net/?f=x%3D2%5Cpm%20%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D)
21.5 inches long
12*3/8=4.5
26-4.5=
21.5 inches
A perfect cube is a number that is a cube of an integer.
Where are the options ? But I know 5% of 352 = 17,6