Answer:
- 26 ounces of 55% solution
- 104 ounces of 80% solution
Step-by-step explanation:
Let x represent the quantity of 80% solution. Then 130-x is the amount of 55% solution. The total amount of salt in the mix is ...
   0.80x +0.55(130 -x) = 0.75·130
   0.25x = 0.20·130 . . . . . . . subtract 0.55(130)
   x = 0.20/0.25(130) = 104
   130-x = 26
She should use 26 ounces of 55% solution and 104 ounces of 80% solution.
 
        
             
        
        
        
Answer:
rotation
Step-by-step explanation:
 
        
             
        
        
        
Answer:
66.67% or 2/3
Step-by-step explanation:
He put 1/3 of his sports books on the shelf. Ignore the 1/4 and focus on how much space the sports books are not taking up which would be 1-1/3=2/3 or 66.67%.
 
        
             
        
        
        
Answer:
21 drawings
Step-by-step explanation:
So lets figure out how many drawings she can make per page. If she make a drawing using 1/3 of the page she can make 3 drawings per page. Now that we know she can make 3 drawings per padge, we can figure out how manyt drawings she can make by multiply the pages by drawings per padge. Let x be the drawings she can make.
7*3=x
Multiple 7*3
21=x
She can make 21 drawings
 
        
             
        
        
        
Answer:
 is the slop in slope intercept form2=-2x
Step-by-step explanation:
-2--4 
8- 10 
 
2=-2x