Answer:
if you are trying to find the amount of gallons of gas she bought, the answer is  13.
Step-by-step explanation:
 
        
             
        
        
        
The true statement is (c) No; the slopes of segment EF and segment DF are not opposite reciprocals.
<h3>
Right triangles </h3>
Right triangles have a pair of perpendicular lines
Coordinates 
The coordinates are given as:
- D = (-2,-1)
- E = (-2,2)
- F = (0,0)
<h3>Slopes</h3>
Start by calculating the slopes of lines DF and EF using:

So, we have:


Also, we have:



For the triangle to be a right triangle, then the calculated slopes must be opposite reciprocals.
i.e.

By comparison, the slopes of both lines are not opposite reciprocals.
Hence, the true statement is (c) 
Read more about right triangles at:
brainly.com/question/17972372
 
        
                    
             
        
        
        
Answer:
I can't see the file
Step-by-step explanation:
 
        
             
        
        
        
Answer:
   3/4
Step-by-step explanation:
It can be helpful to use a common denominator for comparison. That denominator can be 100, meaning we can make them all decimal fractions. Approximate (2 digit) values are good enough for the purpose.
   2/3 ≈ 0.67 . . . . left end of the range
   7/9 ≈ 0.78 . . . . right end of the range
   3/5 = 0.60
   6/9 ≈ 0.67 . . . . = 2/3, so is not greater than 2/3
   3/4 = 0.75
   6/7 ≈ 0.86
The only decimal value between 0.67 and 0.78 is 0.75, corresponding to the fraction 3/4.
   2/3 < 3/4 < 7/9