Answer:
![x=4+-2\sqrt{7}](https://tex.z-dn.net/?f=x%3D4%2B-2%5Csqrt%7B7%7D)
Step-by-step explanation:
To solve, we need to take square root of both sides first:
![(x-4)^2=28\\\sqrt{(x-4)^2} =+-\sqrt{28} \\x-4=+-\sqrt{28}](https://tex.z-dn.net/?f=%28x-4%29%5E2%3D28%5C%5C%5Csqrt%7B%28x-4%29%5E2%7D%20%3D%2B-%5Csqrt%7B28%7D%20%5C%5Cx-4%3D%2B-%5Csqrt%7B28%7D)
Now we use the property of radical shown below to simplify square root of 28:
Property: ![\sqrt{x*y}=\sqrt{x} \sqrt{y}](https://tex.z-dn.net/?f=%5Csqrt%7Bx%2Ay%7D%3D%5Csqrt%7Bx%7D%20%5Csqrt%7By%7D)
Now, we have:
![x-4=+-\sqrt{28}\\x-4=+-\sqrt{4*7}\\x-4=+-\sqrt{4}\sqrt{7}\\x-4=+-2\sqrt{7}](https://tex.z-dn.net/?f=x-4%3D%2B-%5Csqrt%7B28%7D%5C%5Cx-4%3D%2B-%5Csqrt%7B4%2A7%7D%5C%5Cx-4%3D%2B-%5Csqrt%7B4%7D%5Csqrt%7B7%7D%5C%5Cx-4%3D%2B-2%5Csqrt%7B7%7D)
Now we take 4 to the other side and isolate x:
![x-4=+-2\sqrt{7} \\x=4+-2\sqrt{7}](https://tex.z-dn.net/?f=x-4%3D%2B-2%5Csqrt%7B7%7D%20%5C%5Cx%3D4%2B-2%5Csqrt%7B7%7D)
first answer choice is right.
0.36363636363 is the answer
the answers is D cuz there is no line in the picture
100 = x + x/2
3x/2 = 100
x = 200/3
if there was 50% discount:
buying 1 would be $33.33
buying 2 would be $66.67
Answer:
16 inches after one year
Step-by-step explanation:
in 3/4 a year tree grew 12 inches
divide by 3
multiply by 4
16 inches