The answer for this question is C.
First subtract the 3 from both sides to get : sqrt(x) = 10
Then square both sides to get: x = 100
The other equations can't simply proving that they cannot be radical equations
Hope this helps :)
The coordinates of S is (8,-8)
Answer:
What are the signs between the numbers?
Step-by-step explanation:
Answer:
![\large\boxed{B.\ f(x)=4^x}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7BB.%5C%20f%28x%29%3D4%5Ex%7D)
Step-by-step explanation:
Exponential function
is
increasing if ![a > 1\to a\in(1,\ \infty)](https://tex.z-dn.net/?f=a%20%3E%201%5Cto%20a%5Cin%281%2C%5C%20%5Cinfty%29)
decreasing if ![0 < a < 1\to a\in(0,\ 1)](https://tex.z-dn.net/?f=0%20%3C%20a%20%3C%201%5Cto%20a%5Cin%280%2C%5C%201%29)
![A.\ f(x)=\left(\dfrac{1}{4}\right)^x\to a=\dfrac{1}{4}\in(0,\ 1)\to\text{decreasing}\\\\B.\ f(x)=4^x\to a=4\in(1,\ \infty)\to\text{increasing}\\\\C.\ f(x)=(0.4)^x\to a=0.4\in(0,\ 1)\to\text{decreasing}\\\\D.\ f(x)=\left(\dfrac{1}{2}\right)^x\to a=\dfrac{1}{2}\in(0,\ 1)\to\text{decreasing}](https://tex.z-dn.net/?f=A.%5C%20f%28x%29%3D%5Cleft%28%5Cdfrac%7B1%7D%7B4%7D%5Cright%29%5Ex%5Cto%20a%3D%5Cdfrac%7B1%7D%7B4%7D%5Cin%280%2C%5C%201%29%5Cto%5Ctext%7Bdecreasing%7D%5C%5C%5C%5CB.%5C%20f%28x%29%3D4%5Ex%5Cto%20a%3D4%5Cin%281%2C%5C%20%5Cinfty%29%5Cto%5Ctext%7Bincreasing%7D%5C%5C%5C%5CC.%5C%20f%28x%29%3D%280.4%29%5Ex%5Cto%20a%3D0.4%5Cin%280%2C%5C%201%29%5Cto%5Ctext%7Bdecreasing%7D%5C%5C%5C%5CD.%5C%20f%28x%29%3D%5Cleft%28%5Cdfrac%7B1%7D%7B2%7D%5Cright%29%5Ex%5Cto%20a%3D%5Cdfrac%7B1%7D%7B2%7D%5Cin%280%2C%5C%201%29%5Cto%5Ctext%7Bdecreasing%7D)