Answer:
4x=12
Step-by-step explanation:
12 pieces and each of the four friends will eat 3 pieces each.
so mathematical model is
4x=12
x=12/4
x=3
I’m pretty sure it would be B
<u>Answer:</u>
Option C. The solution for the system of equations is (-1,7) and (-4,13)
<u>Solution:
</u>
The equation for the system given is,
![y = -2x + 5](https://tex.z-dn.net/?f=y%20%3D%20-2x%20%2B%205)
![y=x^{2}+3 x+9](https://tex.z-dn.net/?f=y%3Dx%5E%7B2%7D%2B3%20x%2B9)
Now we can write,
![-2 x+5=x^{2}+3 x+9](https://tex.z-dn.net/?f=-2%20x%2B5%3Dx%5E%7B2%7D%2B3%20x%2B9)
![x^{2}+3 x+9+2 x-5=0](https://tex.z-dn.net/?f=x%5E%7B2%7D%2B3%20x%2B9%2B2%20x-5%3D0)
![x^{2}+5 x+4=0](https://tex.z-dn.net/?f=x%5E%7B2%7D%2B5%20x%2B4%3D0)
(//simplifying)
![x(x+4) +1(x+4) = 0](https://tex.z-dn.net/?f=x%28x%2B4%29%20%2B1%28x%2B4%29%20%3D%200)
![(x+4)(x+1) = 0](https://tex.z-dn.net/?f=%28x%2B4%29%28x%2B1%29%20%3D%200)
![x = -4 \ or -1](https://tex.z-dn.net/?f=x%20%3D%20-4%20%5C%20or%20-1)
When ![x = -4, \ then \ y = -2\times(-4) + 5 =13](https://tex.z-dn.net/?f=x%20%3D%20-4%2C%20%5C%20then%20%5C%20y%20%3D%20-2%5Ctimes%28-4%29%20%2B%205%20%3D13)
When
So, solution is C, (-4,13) and (-1,7)
Answer:
Step-by-step explanation:
either 10 or 6 heres this