-2 2/5 is the answer to question
Answer:
These are the inequalities
A: ![W\geq -7](https://tex.z-dn.net/?f=W%5Cgeq%20-7)
B: ![W > -7](https://tex.z-dn.net/?f=W%20%3E%20-7)
C: ![W < -7](https://tex.z-dn.net/?f=W%20%3C%20-7)
D: ![W\leq -7](https://tex.z-dn.net/?f=W%5Cleq%20-7)
I assume the "different" one is referring to the wording of the expression. B, C, and D are all similarly worded so I believe A is the "different" one.
Answer:
The final temperature was 9 degrees.
Step-by-step explanation:
You can first multiply 13x2, 7x2, and 9x2. Then you subtract 26 and 18 from 34. then add 14
For this case we must find the inverse of the following function:
![f (x) = - \frac {1} {2} \sqrt {x + 3}](https://tex.z-dn.net/?f=f%20%28x%29%20%3D%20-%20%5Cfrac%20%7B1%7D%20%7B2%7D%20%5Csqrt%20%7Bx%20%2B%203%7D)
We follow the steps below:
Replace f(x) with y:
![y = -\frac {1} {2} \sqrt {x + 3}](https://tex.z-dn.net/?f=y%20%3D%20-%5Cfrac%20%7B1%7D%20%7B2%7D%20%5Csqrt%20%7Bx%20%2B%203%7D)
We exchange the variables:
![x = - \frac {1} {2} \sqrt {y + 3}](https://tex.z-dn.net/?f=x%20%3D%20-%20%5Cfrac%20%7B1%7D%20%7B2%7D%20%5Csqrt%20%7By%20%2B%203%7D)
We solve for "y":
![- \frac {1} {2} \sqrt {y + 3} = x](https://tex.z-dn.net/?f=-%20%5Cfrac%20%7B1%7D%20%7B2%7D%20%5Csqrt%20%7By%20%2B%203%7D%20%3D%20x)
Multiply by -2 on both sides of the equation:
![\sqrt {y + 3} = - 2x](https://tex.z-dn.net/?f=%5Csqrt%20%7By%20%2B%203%7D%20%3D%20-%202x)
We raise both sides of the equation to the square to eliminate the radical:
![(\sqrt {y + 3}) ^ 2 = (- 2x) ^ 2\\y + 3 = 4x ^ 2](https://tex.z-dn.net/?f=%28%5Csqrt%20%7By%20%2B%203%7D%29%20%5E%202%20%3D%20%28-%202x%29%20%5E%202%5C%5Cy%20%2B%203%20%3D%204x%20%5E%202)
We subtract 3 from both sides of the equation:
![y = 4x ^ 2-3](https://tex.z-dn.net/?f=y%20%3D%204x%20%5E%202-3)
We change y by f ^ {- 1} (x):
![f ^ {- 1} (x) = 4x ^ 2-3](https://tex.z-dn.net/?f=f%20%5E%20%7B-%201%7D%20%28x%29%20%3D%204x%20%5E%202-3)
Answer:![f ^ {- 1} (x) = 4x ^ 2-3](https://tex.z-dn.net/?f=f%20%5E%20%7B-%201%7D%20%28x%29%20%3D%204x%20%5E%202-3)