Out of a sample of 80 books, 6 were historical books. So the percentage of books in the sample will be:
%
We can use this sample to represent the entire collection of books in the library. So the best estimate of total number of historical books in the library is 7.5% of 21360 , which comes out to be:
7.5 % of 21360 =
Therefore, roughly 1602 books out of 21360 book of library are historical books.
If you note that a square can be circumscribed by a circle (circumscribed is when the object is drawn in...right?) this makes things handy.
Draw a circle with the compass, for the diameter = side length of the square.
Drawing the circle ensures that the side lengths will all be congruent.
Now take your straightedge, and draw 4 sides, 2 sides parallel to each other on 2 outer sides of the circle, and 2 on the top, also parallel, BUT also perpendicular to the other 2 lines. You have a square
Answer:
11 shud be ur answerr think :0
Step-by-step explanation:
Answer:
The solution of the given two linear equations
x = 1 and y =1
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
Given 4 x + 5 y = 9 ..(i)
- 11 x - 9 y = - 20 ...(ii)
Multiply 11 by (i) and multiply 4 by (ii)
44 x + 55 y = 99 ...(a)
- 44 x - 36 y = -80...(b)
Adding above equations (a) and (b) , we get
19 y = 19
y = 1
<u><em>Step(ii):</em></u>-
substitute y =1 in equation (i) , we get
4 x + 5 y = 9
4 x + 5 = 9
4 x = 4
x =1
<u><em>Final answer:</em></u>-
<em>The solution of the given two linear equations are</em>
<em>x = 1 and y =1</em>
<u></u>
Sequence
8 - 7 = 1
15 - 8 = 7
23 - 15 = 8
38 - 23 = 15
For more sequences
38 + 23 = 61
Then
61 + 38 = 99
And so on the sequence continue