D.
Explanation
I saw this answer in a different question today.
Moreover, 1n + 0.25n = 1.25n
 
        
                    
             
        
        
        
3,000x10=30,000
Ms.Nelson has $30,000 in her bank account. 
        
                    
             
        
        
        
869 * .08 = 69.52
69.52 + 869 = 938.52
938.52- 75 =  863.52
        
                    
             
        
        
        
Me I am very good at math I am a tutor
        
             
        
        
        
Answer:
Infinite solutions
Step-by-step explanation:
1) First, you can solve this easily by elimination. Multiply the first equation by -2 in order to cancel out terms when adding to the second equation. 
2) Then, add the new set of equations together. However, everything cancels out, bringing us to 0 = 0. This means that the lines the equations make must be the same. Thus, all real numbers must make this equation true, meaning that there are infinite solutions.