Answer:this one is hard 
Step-by-step explanation:
 
        
             
        
        
        
Since z is the midpoint, rz and zt must be equal
4x - 15 = 25
4x = 40
X = 10
Plug the answer in and rz equals 40-15 which is 25.
25 + 25 = 50
Or if you really wanted, since you know 25 is half, just add them together right off the bat. (25 and 25, I mean)
        
                    
             
        
        
        
Original price is 5$ 
<span>
Sale / Discounted Price: is 3.2
</span>
the sale price is 3.2$
        
                    
             
        
        
        
a - side of the square
4a - the perimeter of a square
76 in - the perimeter of a square
The equation:
4a = 76     <em>divide both sides by 4</em>
a = 19 in.
<h3>Answer: Each side has length 19 inches.</h3>
 
        
             
        
        
        
Answer: 7788.50
Solving steps: 
P = 7400, R = 10.5%, T = 6
F = P + P rt
P = 7400
R = 10.5%
T = 6
F = 7400 + 7400rt 
7400 x (12 + 6 x 0.105/12
7400 x (12 + 0.63)/12
7400 x 12.63/12
93462/12
15577/12
15577/2 0.01
7788.50
Answer: 7788.50