Answer:
Tasha made her mistake in step 4.
 
        
                    
             
        
        
        
Answer:
<h2>405</h2>
Step-by-step explanation:
The nth term of a geometric sequence is given by the formula

Given data
first term  a1=5 and
common ratio r=-3
n= 5

The 5th term is 405
 
        
             
        
        
        
Answer:
$5.75
Step-by-step explanation: 
I hope you get it right!
 
        
             
        
        
        
It will just be a+b-180 because there are no like terms to put together :)