Answer:
the answer is 19-2v combine like terms if not that then try this....
19-2y=0
-2y=-19
Then divide by -2
y=-19/-2
=9.5
Solving proportions is simply a matter of stating the ratios as fractions, setting the two fractions equal to each other, cross-multiplying, and solving the resulting equation. You'll probably start out by just solving proportions, like this: Find the unknown value in the proportion: 2 : x = 3 : 9.
Answer:
67
Step-by-step explanation:
Answer:
54 x 1; 27 x 2; 18 x 3; 9 x 6
Step-by-step explanation:
Find all the factors of 54:
1, 2, 3, 6, 9, 18, 27, 54
A rectangle with area 54 can have the dimensions:
54, 1
27, 2
18, 3
9, 6
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":