Answer:
4.5
Step-by-step explanation:
if we take -1 and put it in L.H.S it becomes 8+1=9 and then when u put x2 which is x×2 to L.H.S it becomes 9÷2 =4.5
Answer:
A
Step-by-step explanation:
I did it in a on a piece of paper
Answer:
<em><u>Equivalent</u></em><em><u> </u></em><em><u>fractions</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>5</u></em><em><u>/</u></em><em><u>3</u></em><em><u> </u></em><em><u>are-</u></em>
- <em><u>5</u></em><em><u>/</u></em><em><u>3</u></em><em><u>×</u></em><em><u>2</u></em><em><u>/</u></em><em><u>2</u></em><em><u>=</u></em><em><u>1</u></em><em><u>0</u></em><em><u>/</u></em><em><u>6</u></em>
- <em><u>5</u></em><em><u>/</u></em><em><u>3</u></em><em><u>×</u></em><em><u>3</u></em><em><u>/</u></em><em><u>3</u></em><em><u>=</u></em><em><u>1</u></em><em><u>5</u></em><em><u>/</u></em><em><u>9</u></em>
- <em><u>5</u></em><em><u>/</u></em><em><u>3</u></em><em><u>×</u></em><em><u>4</u></em><em><u>/</u></em><em><u>4</u></em><em><u>=</u></em><em><u>2</u></em><em><u>0</u></em><em><u>/</u></em><em><u>1</u></em><em><u>2</u></em>
Answer:
9.11*10^-4 %
Step-by-step explanation:
To find the probability, you simply need to find the possible outcomes that allows no rooks to be in danger, and the possible amount of ways to place the rooks.
For the first outcome, you start by putting 1 rook in the first columns, you have 8 possible rows to do this. The next rook in the next column will only have 7 possible rows, as you have to exclude the one where the previous rook is located. The next rook, 6 possibilities, the next 5, and so on. So we conclude that the total amount of ways so that none of the rooks can capture any of the other rooks is 8*7*6*5*4*3*2*1 = 8! = 40320
In order to find the total amount of ways to place the rooks, you can just use a combinatoric:
![\left[\begin{array}{ccc}64\\8\end{array}\right]= \frac{64!}{8!(64-8)!} = 4.43*10^9](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D64%5C%5C8%5Cend%7Barray%7D%5Cright%5D%3D%20%5Cfrac%7B64%21%7D%7B8%21%2864-8%29%21%7D%20%3D%204.43%2A10%5E9)
Then:
P = 
1.) 28- all numbers listed are divisible by 28
2.) 15 (30/2, 45/3, and 75/5)