The Xtra detergent. Because it is $8.77 and all the rest are higher.
        
             
        
        
        
Answer:
x=30/7 or decimal x=4.28571
Step-by-step explanation:
 
        
             
        
        
        
<span>                   a⁴(3a² - 2a + 1)
We just have to multiply each term inside the parentheses by  a⁴  .
           a⁴</span><span>(3a²        )  =  3a⁶
  
           a⁴</span><span>(    - 2a    )  =  -2a⁵
  
           a⁴</span><span>(            1)  =  a⁴
Now, just addum up :      3a⁶ - 2a⁵ + a⁴</span>
        
             
        
        
        
-2log_5 7x = log_5 2
log_5[1/(7x)^2] = log_5 2
log_5(1/49x^2) = log_5 2
log_5(1 - 49x^2) = log_5 2
1 - 49x^2 = 2
You finish.