1 solution is available when variable equals a constant.
Answer: Option B.
<u>Explanation:</u>
You will be able to determine if an equation has one solution (which is when one variable equals one number), or if it has no solution (the two sides of the equation are not equal to each other) or infinite solutions (the two sides of the equation are identical).
The ordered pair that is the solution of both equations is the solution of the system. A system of two linear equations can have one solution, an infinite number of solutions, or no solution. If a consistent system has exactly one solution, it is independent.
Answer:
Somewhere in the 600, 500 or 700 maybe even 800?
Answer:
Total number of ways will be 
Step-by-step explanation:
We have to select 7 countries
3 countries selected from a block of 54
So number of ways of selecting these three countries 
Now 1 country is selected from 66 block
So number of ways to select 1 country = 
Now next 3 country is selected from 69 country
So 
So total number of ways to select 7 countries = 24804×65×52394 
Answer: 24
Step-by-step explanation: