Step-by-step explanation:
2x=6
x=<u>6</u>
<u> </u><u> </u><u> </u><u> </u>2
x=3 ans
hope it help u
For this case we have the following quadratic equation:
![2x ^ 2-4x + 9 = 0](https://tex.z-dn.net/?f=2x%20%5E%202-4x%20%2B%209%20%3D%200)
The solutions are given by:
![x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%20%7B-b%20%5Cpm%20%5Csqrt%20%7Bb%20%5E%202-4%20%28a%29%20%28c%29%7D%7D%20%7B2a%7D)
We have to:
![a = 2\\b = -4\\c = 9](https://tex.z-dn.net/?f=a%20%3D%202%5C%5Cb%20%3D%20-4%5C%5Cc%20%3D%209)
Substituting:
![x = \frac {- (- 4) \pm \sqrt {(- 4) ^ 2-4 (2) (9)}} {2 (2)}\\x = \frac {4 \pm \sqrt {16-72}} {4}\\x = \frac {4 \pm \sqrt {-56}} {4}\\x = \frac {4 \pm \sqrt {-1 * 56}} {4}\\x = \frac {4 \pmi \sqrt {2 ^ 2 * 14}} {4}\\x = \frac {4 \pm2i \sqrt {14}} {4}\\x = \frac {2 \pm i\sqrt {14}} {2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%20%7B-%20%28-%204%29%20%5Cpm%20%5Csqrt%20%7B%28-%204%29%20%5E%202-4%20%282%29%20%289%29%7D%7D%20%7B2%20%282%29%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B4%20%5Cpm%20%5Csqrt%20%7B16-72%7D%7D%20%7B4%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B4%20%5Cpm%20%5Csqrt%20%7B-56%7D%7D%20%7B4%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B4%20%5Cpm%20%5Csqrt%20%7B-1%20%2A%2056%7D%7D%20%7B4%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B4%20%5Cpmi%20%5Csqrt%20%7B2%20%5E%202%20%2A%2014%7D%7D%20%7B4%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B4%20%5Cpm2i%20%5Csqrt%20%7B14%7D%7D%20%7B4%7D%5C%5Cx%20%3D%20%5Cfrac%20%7B2%20%5Cpm%20i%5Csqrt%20%7B14%7D%7D%20%7B2%7D)
Answer:
![x_ {1} = \frac {2 + i \sqrt {14}} {2}\\x_ {2} = \frac {2-i \sqrt {14}} {2}](https://tex.z-dn.net/?f=x_%20%7B1%7D%20%3D%20%5Cfrac%20%7B2%20%2B%20i%20%5Csqrt%20%7B14%7D%7D%20%7B2%7D%5C%5Cx_%20%7B2%7D%20%3D%20%5Cfrac%20%7B2-i%20%5Csqrt%20%7B14%7D%7D%20%7B2%7D)
Well since there are more than 10 people she should first get one box. She will then have 5 more people to feed so she will just have to buy another even though there will be leftovers.
Answer:
14.5 i think
Step-by-step explanation:
2.5 + 12 = 14.5
Answer:
2 2/5
Step-by-step explanation:
4 x 3/5
12/5 = 2 2/5
Hope I helped!