Answer:
78.57
Step-by-step explanation:
Radius is 5 feet
Area of circle is pi*r  Squared
22/7*5*5
78.57 square feet 
 
        
                    
             
        
        
        
Answer:
the answer is c
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C. True; by the Invertible Matrix Theorem if the equation Ax=0 has only the trivial solution, then the matrix is invertible. Thus, A must also be row equivalent to the n x n identity matrix.
Step-by-step explanation:
The Invertible matrix Theorem is a Theorem which gives a list of equivalent conditions for an n X n matrix to have an inverse. For the sake of this question, we would look at only the conditions needed to answer the question.
- There is an n×n matrix C such that CA= . .
- There is an n×n matrix D such that AD= . .
- The equation Ax=0 has only the trivial solution x=0.
- A is row-equivalent to the n×n identity matrix  . .
- For each column vector b in  , the equation Ax=b has a unique solution. , the equation Ax=b has a unique solution.
- The columns of A span  . .
Therefore the statement:
If there is an n X n matrix D such that AD=I, then there is also an n X n matrix C such that CA = I is true by the conditions for invertibility of matrix:
- The equation Ax=0 has only the trivial solution x=0.
- A is row-equivalent to the n×n identity matrix  . .
The correct option is C.
 
        
             
        
        
        
The answer is c because the number of tickets (t) times the number of adults is the total cost
        
             
        
        
        
Answer:

Step-by-step explanation:
Given: 
To solve for y, let us first isolate y on one side of the equation. We can do this by subtracting  from the left and move it to the right. We then get:
 from the left and move it to the right. We then get:

Now, we have y isolated. We now have to remove the 4 from the y. The only way to do this is divide both sides by 4. We then get our final answer:

We can clean this up by putting it in a common form, slope-intercept form:
