Answer:
-149
Step-by-step explanation:
To solve, we must first plug our known values for a and b into the equation and then follow the order of operations.
1. ![-(4)^{2} -(-7)+5(4)(-7)](https://tex.z-dn.net/?f=-%284%29%5E%7B2%7D%20-%28-7%29%2B5%284%29%28-7%29)
2. ![-16-(-7)+5(4)(-7)](https://tex.z-dn.net/?f=-16-%28-7%29%2B5%284%29%28-7%29)
3. ![-9+5(4)(-7)](https://tex.z-dn.net/?f=-9%2B5%284%29%28-7%29)
4. ![-9+20(-7)](https://tex.z-dn.net/?f=-9%2B20%28-7%29)
5. ![-9-140=-149](https://tex.z-dn.net/?f=-9-140%3D-149)
D: (1,-1) is your answer because on graph that’s were both lines cross each other
Answer:
see below
Step-by-step explanation:
we have
![5x^2-2x+1=0](https://tex.z-dn.net/?f=5x%5E2-2x%2B1%3D0)
and the quadratic equation is
![ax^2+bx+c=0](https://tex.z-dn.net/?f=ax%5E2%2Bbx%2Bc%3D0)
so we can see that
![a=5\\\\b=-2\\\\c=1](https://tex.z-dn.net/?f=a%3D5%5C%5C%5C%5Cb%3D-2%5C%5C%5C%5Cc%3D1)
and the quadratic formula is
it should go this symbol ± instead of +-
so we insert each value
![x=\frac{-(-2)+-\sqrt{(-2)^2-4(5)(1)} }{2(5)} \\\\x=\frac{2+-\sqrt{4-20} }{10}\\\\x=\frac{2+-\sqrt{-16} }{10} \\\\x=\frac{2+-4i}{10} \\\\x_1=\frac{2(1+2i)}{2*5} \\\\x_1=\frac{1+2i}{5} \\\\x_2=\frac{2(1-2i)}{2*5} \\\\x_2=\frac{1-2i}{5}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%28-2%29%2B-%5Csqrt%7B%28-2%29%5E2-4%285%29%281%29%7D%20%7D%7B2%285%29%7D%20%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-%5Csqrt%7B4-20%7D%20%7D%7B10%7D%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-%5Csqrt%7B-16%7D%20%7D%7B10%7D%20%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-4i%7D%7B10%7D%20%5C%5C%5C%5Cx_1%3D%5Cfrac%7B2%281%2B2i%29%7D%7B2%2A5%7D%20%5C%5C%5C%5Cx_1%3D%5Cfrac%7B1%2B2i%7D%7B5%7D%20%5C%5C%5C%5Cx_2%3D%5Cfrac%7B2%281-2i%29%7D%7B2%2A5%7D%20%5C%5C%5C%5Cx_2%3D%5Cfrac%7B1-2i%7D%7B5%7D)
i don't know if you already know about imaginary numbers if you do then the answer is all the work
if you don't know, well just go until
![x=\frac{2+-\sqrt{-16} }{10}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B2%2B-%5Csqrt%7B-16%7D%20%7D%7B10%7D)
and say there is no answer to this, because negatives don't have square roots
End time would be 9:50 am.
Add 2 hours to 7; you’d get 9
Add 20 minutes to 30; you’d get 50
700,000 + 500 + 60 + 2
Seven hundred thousand five hundred sixty two