Given f(x)=-x-1,find f(5)

f(5)=4

Step-by-step explanation:

f(5)=5_1=4

Option C

Step-by-step explanation:

In a system of linear equations we have that:

If the equations are linear independent, we can have that if there are more equations than variables, we may find that there is not a solution for our system.

if we have equations like  

x + y = 2

x + y = 5

obviously we will not find solutions.

If the equations are linearly independent and the number of equations is equal to the number of variables, we will find only one solution.

If we have fewer equations than variables, then we will find that we have infinite solutions, because one of the variables remains indeterminate and we can give that variable any value.

Then, the option that is not a possible solution is option C, only two solutions.