Answer:
![\sqrt{-5}=i\sqrt{5}](https://tex.z-dn.net/?f=%5Csqrt%7B-5%7D%3Di%5Csqrt%7B5%7D)
![\sqrt{-25}=5i](https://tex.z-dn.net/?f=%5Csqrt%7B-25%7D%3D5i)
Step-by-step explanation:
i is an imaginary unit, this means
![i^2=-1](https://tex.z-dn.net/?f=i%5E2%3D-1)
Rewrite -5 as ![5\cdot (-1)=5\cdot i^2,](https://tex.z-dn.net/?f=5%5Ccdot%20%28-1%29%3D5%5Ccdot%20i%5E2%2C)
then
![\sqrt{-5}=\sqrt{5i^2}=\sqrt{5}\cdot \sqrt{i^2}=\sqrt{5}\cdot i=i\sqrt{5}](https://tex.z-dn.net/?f=%5Csqrt%7B-5%7D%3D%5Csqrt%7B5i%5E2%7D%3D%5Csqrt%7B5%7D%5Ccdot%20%5Csqrt%7Bi%5E2%7D%3D%5Csqrt%7B5%7D%5Ccdot%20i%3Di%5Csqrt%7B5%7D)
Rewrite -25 as ![-25=25\cdot (-1)=25\cdot i^2,](https://tex.z-dn.net/?f=-25%3D25%5Ccdot%20%28-1%29%3D25%5Ccdot%20i%5E2%2C)
then
![\sqrt{-25}=\sqrt{25\cdot i^2}=\sqrt{25}\cdot \sqrt{i^2}=5\cdot i=5i](https://tex.z-dn.net/?f=%5Csqrt%7B-25%7D%3D%5Csqrt%7B25%5Ccdot%20i%5E2%7D%3D%5Csqrt%7B25%7D%5Ccdot%20%5Csqrt%7Bi%5E2%7D%3D5%5Ccdot%20i%3D5i)
Answer:
1/5
Step-by-step explanation:
there are 5 groups
1. 1-9
2. 10-19
3.20-29
4.30-39
5.40-49
and 50
Answer:
b!!
Step-by-step explanation:
hope this helped!
Answer:
30
Step-by-step explanation:
1/4 is the answer to the problem