Answer:
Shawn do because he sell 9 per week Brett sells 8 per week
(1)
we are given
![x^2+6x+10=0](https://tex.z-dn.net/?f=x%5E2%2B6x%2B10%3D0)
we can use quadratic formula
![\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}](https://tex.z-dn.net/?f=%5Cmathrm%7BFor%5C%3Aa%5C%3Aquadratic%5C%3Aequation%5C%3Aof%5C%3Athe%5C%3Aform%5C%3A%7Dax%5E2%2Bbx%2Bc%3D0%5Cmathrm%7B%5C%3Athe%5C%3Asolutions%5C%3Aare%5C%3A%7D)
![x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%20%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
now, we can compare and find a , b and c
we get
![a=1,b=6,c=10](https://tex.z-dn.net/?f=a%3D1%2Cb%3D6%2Cc%3D10)
now, we can plug these values into quadratic formula
![x=\frac{-6\pm \sqrt{6^2-4(1)(10)}}{2(1)}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-6%5Cpm%20%5Csqrt%7B6%5E2-4%281%29%2810%29%7D%7D%7B2%281%29%7D)
![x=\frac{-6+\sqrt{6^2-4\cdot \:1\cdot \:10}}{2\cdot \:1}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-6%2B%5Csqrt%7B6%5E2-4%5Ccdot%20%5C%3A1%5Ccdot%20%5C%3A10%7D%7D%7B2%5Ccdot%20%5C%3A1%7D)
we can simplify it
![x=-3+i](https://tex.z-dn.net/?f=x%3D-3%2Bi)
![x=\frac{-6-\sqrt{6^2-4\cdot \:1\cdot \:10}}{2\cdot \:1}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-6-%5Csqrt%7B6%5E2-4%5Ccdot%20%5C%3A1%5Ccdot%20%5C%3A10%7D%7D%7B2%5Ccdot%20%5C%3A1%7D)
![x=-3-i](https://tex.z-dn.net/?f=x%3D-3-i)
so, we will get solution
{−3+i, −3−i}.........Answer
(2)
we are given equation as
![x^2-8x+14=0](https://tex.z-dn.net/?f=x%5E2-8x%2B14%3D0)
Since, Jamal solve this equation by completing square
so, firstly we will move constant term on right side
so, subtract both sides by 14
![x^2-8x+14-14=0-14](https://tex.z-dn.net/?f=x%5E2-8x%2B14-14%3D0-14)
![x^2-8x=-14](https://tex.z-dn.net/?f=x%5E2-8x%3D-14)
we can write
![-8x=-2\times 4\times x](https://tex.z-dn.net/?f=-8x%3D-2%5Ctimes%204%5Ctimes%20x)
so, we will add both sides by 4^2
![x^2-8x+4^2=-14+4^2](https://tex.z-dn.net/?f=x%5E2-8x%2B4%5E2%3D-14%2B4%5E2)
we get
..............Answer
I don’t know if this will help
A lot but To convert temperatures in degrees Celsius to Fahrenheit, multiply by 1.8 (or 9/5) and add 32.
(-89.2°C × 9/5) + 32 = -128.6°F
Answer:
87.5%
Step-by-step explanation:
7/8x100=87.5
C
5 × (8 + 2 ) = 5(8 + 2) = (5 × 8 ) + (5 × 2)