2x + 12 = 18
18 - 12 = 6
2x = 6
x = 3
length = 1/2 w+9
perimeter= 60 =2(l+w)
substitute in for length
60 = 2(1/2 w +9 +w)
60 = 2 (3/2 w +9)
distribute
60 = 3w + 18
subtract 18 from each side
42 = 3w
divide by 3 on each side
14 = w
length = 1/2 w + 9
length = 1/2 (14) +9
7 + 9
16cm
I can't see the pages to be able to help you sorry
Answer:
The right solution is "3.29, 3.57".
Step-by-step explanation:
Seems that the given problem is incomplete. Below is the attachment of the complete and appropriate query.
<u>The given values are</u>:
Randomly selected adults,

Mean,

Standard deviation,

Now,
At 95% confidence level if given by,
= 
On putting the given values, we get
= 
= 
= 
= 