√2 - 1 (√2 - 1)(√2 - 1)
--------- = ---------------------
√2 + 1 (√2 + 1)(√2 - 1)
2 + 1 - 2√2
= ---------------
2 - 1
= 3 - 2√2 Answer
Answers:
32/100 = 16/50 = 8/25
72/100 = 36/50 = 18/25
43/100 = 43/100
29/100 = 29/100
Answer:
<u>n = 84</u> and there are 24 blue cards
Step-by-step explanation:
I'm guessing you're either trying to find n or the number of blue cards.
To find the number of blue cards:
Luna has 60 red cards and the ratio of red to blue cards is 5:2.
If you divide 60 by 5 (the number of red cards divided by the ratio for red cards) you get 12, which would be 1 in the ratio. The number in the ratio for blue cards is 2, so multiply 12 by 2 and you get 24. Therefore, the number of blue cards is 24.
<u>If the explanation is confusing (which I know it is, sorry) you can look at it like this, and this is also a check:</u>
The ratio of red to blue cards can be written as 5/2. If you do 5 ÷ 2, you get 2.5 and if you divide 60/24, you get 2.5
To find n, the number of cards Luna has, just add the number of red cards and the number of blue cards: 60 + 24 = 84
