Answer:
2x + 3y +1
Step-by-step explanation:
-2x + 4x -6y + 9y +3 -2 (arranging)
2x + 3y + 1
Kristen is right because if you do 50-5=45, so it is more.
Given the equation:
![y=y_0e^{-kt}](https://tex.z-dn.net/?f=y%3Dy_0e%5E%7B-kt%7D)
You know that the radioactive substance has this half-life (in years)
![t=1110](https://tex.z-dn.net/?f=t%3D1110)
And:
![y=\frac{y_0}{2}](https://tex.z-dn.net/?f=y%3D%5Cfrac%7By_0%7D%7B2%7D)
Therefore, you can rewrite the equation in this form in order to find "k":
![\frac{1}{2}=e^{-k(1110)}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%3De%5E%7B-k%281110%29%7D)
Solve for "k":