Let the youngest sister be n years
Lana will be 2n years, as her youngest sister is half her age
The age of the twins separately will be 2n-2 as they are 2 years younger than Lana
So, the equation looks like this:
n + 2n + 2(2n-2) = 45
Now solve for n:
3n + 4n - 4 = 45
7n - 4 = 45
7n = 49
n = 7
So the youngest sister is 7, Lana is 14 and the twins are 12. 14 + 12 + 12 + 7 =45
Answer:
what do u want me to do
Step-by-step explanation:
2.7 is 27/10 and 3.6 is 18/5
Complete Question
The complete question is shown on the first uploaded image
Answer:
The 95% confidence interval is 
Step-by-step explanation:
From the question we are told that
The first sample size is 
The first proportion 
The second sample size is 
The second proportion is 
Given that the confidence level is 95% then the level of significance is mathematically represented as


From the normal distribution table we obtain the critical value of
the value is

Now using the formula from the question to construct the 95% confidence interval we have

Here 
=> 
=> 
and

=> 
=> 
So


Answer: The answers are in the photo.
Step-by-step explanation:
Hope this helps