Answer:
option d is correct answer
Step-by-step explanation:
-18x+12
 
        
             
        
        
        
The lowest I could go was -6x - 9. (Hope that helps)
        
             
        
        
        
Her salary 4 years ago would have been $30,000.
If 45,000 is 15,000 less than double her previous salary, we must first add 15,000 to 45,000 to find what double her salary was.
45,000+15,000=60,000.
Since this is twice her salary, we divide this by 2.
60,000/2= 30,000.
So, her salary 4 years ago would have been $30,000.
I hope this helps!
        
             
        
        
        
Answer:
 .
.
Step-by-step explanation:
It is given that a number, x, rounded to 2 significant figures is 1300.
It is possible if,
1. The value of x is greater than of equal to 1250 and less than or equal to 1300.
i.e.,  ...(1)
     ...(1)
2. The value of x is greater than of equal to 1300 and less than 1350.
i.e.,  ...(2)
       ...(2)
On combining (1) and (2), we get

1350 is not included in the error interval for x.
Interval notation is  .
.
Therefore, the error interval for x is  .
.