Step-by-step explanation:
1) the length of the side is:
![\frac{4-\sqrt{2} }{\sqrt{2}}=2\sqrt{2}-1.](https://tex.z-dn.net/?f=%5Cfrac%7B4-%5Csqrt%7B2%7D%20%7D%7B%5Csqrt%7B2%7D%7D%3D2%5Csqrt%7B2%7D-1.)
2) the required perimeter is:
![P=4(2\sqrt{2} -1)=8\sqrt{2} -4.](https://tex.z-dn.net/?f=P%3D4%282%5Csqrt%7B2%7D%20-1%29%3D8%5Csqrt%7B2%7D%20-4.)
3) the required area is:
![A=(2\sqrt{2} -1)^2=9-4\sqrt{2}.](https://tex.z-dn.net/?f=A%3D%282%5Csqrt%7B2%7D%20-1%29%5E2%3D9-4%5Csqrt%7B2%7D.)
D... flip 1/5 into 5 is the correct way
Answer:
negative
Step-by-step explanation:
example:
t = -.5 and u = .2
-.5 - .2 = -.7
Answer:
The probability of selecting the green ball from urn III is ²/₃
Step-by-step explanation:
Given;
total number of balls in urn I = 10
number of green balls in urn I , = 2
total number of balls in urn II = 10
number of green balls in urn II , = 2
total number of balls in urn III = 10
number of green balls in urn II , = 8
![P = \frac{\frac{8}{10} }{\frac{2}{10} + \frac{2}{10}+ \frac{8}{10}}\\\\P = \frac{\frac{8}{10} }{\frac{12}{10} }\\\\P = \frac{8}{10} *\frac{10}{12} \\\\P = \frac{8}{12}\\\\ P = \frac{2}{3}](https://tex.z-dn.net/?f=P%20%3D%20%5Cfrac%7B%5Cfrac%7B8%7D%7B10%7D%20%20%7D%7B%5Cfrac%7B2%7D%7B10%7D%20%2B%20%5Cfrac%7B2%7D%7B10%7D%2B%20%5Cfrac%7B8%7D%7B10%7D%7D%5C%5C%5C%5CP%20%3D%20%20%5Cfrac%7B%5Cfrac%7B8%7D%7B10%7D%20%20%7D%7B%5Cfrac%7B12%7D%7B10%7D%20%7D%5C%5C%5C%5CP%20%3D%20%5Cfrac%7B8%7D%7B10%7D%20%20%2A%5Cfrac%7B10%7D%7B12%7D%20%5C%5C%5C%5CP%20%3D%20%5Cfrac%7B8%7D%7B12%7D%5C%5C%5C%5C%20P%20%3D%20%5Cfrac%7B2%7D%7B3%7D)
Therefore, the probability of selecting the green ball from urn III is ²/₃