36
Explanation: (-6 x -1)(-2 x -3)
6 x 6 = 36
Because - x - = +
Answer:
Step-by-step explanation:
90-66=?
Since 2 2/5 is equal to 12/5, (12/5)/(1/5), or 12 cubes can fit along the length of the brick.
Answer: No solution. It would end up being 1=-1.
This is the concept of arithmetic. To calculate the percentage of time life has existed we proceed as follows;
According to history:
The age of earth is 4.6 billion years
the age of life is as it appeared from unicellular is 3.8 billion years.
thus the percentage of the above will be:
3.8/4.6 x 100
=0.82609x100
=82.609%