Answer:
It is because the red disks were more than the other disks before the pupils added other disks.
Answer:
-3, -7
Step-by-step explanation:
either x + 3 = 0 --> x = -3
or x + 7 = 0 --> x = -7
Answer:
6
Step-by-step explanation:
The number on the right side of the equal side represents the radius, HOWEVER, it is squared, therefore you must square root it to get 6
Answer:
Length of one side of the region containing small squares is 16 inches.
Step-by-step explanation:
Given:
Area of the chess board = 324 square inches
Border around 64 -squares on board = 1 inch
We need to find the length containing small squares.
Solution:
Let the length of one side of the chess board be 'L'.
Now we know that;
Border around 64 -squares on board = 1 inch
So we can say that;
Length of the side of the chess board = 
Now we know that;
Area of square is equal to square of its side.
framing in equation form we get;

Now taking square root on both side we get;

Now subtracting both side by 2 we get;

Hence Length of one side of the region containing small squares is 16 inches.