Answer:   
<h3>         26²/₃ liters of 15% acid and 13¹/₃ liters of 33% acid</h3>
Step-by-step explanation:
Concentration            Amount of             Amount
of Solution                   Solution (L)             of Acid
     15%                                x                         0.15x
     33%                               y                         0.33y
     21%                              40                      0.21•40       
        
x + y = 40    ⇒  x = 40 - y
0.15x + 0.33y = 0.21•40
0.15(40 - y) + 0.33y = 0.21•40
6 - 0.15y + 0.33y = 8.4
   0.18y = 2.4
         y = 13¹/₃
x = 40 -  13¹/₃ = 26²/₃
 
        
             
        
        
        
89-131=-42 the answer is k=-131
        
             
        
        
        
Answer:
x = sqrt(3)/5 - 9/5 or x = -9/5 - sqrt(3)/5
Step-by-step explanation by completing the square:
Solve for x over the real numbers:
4 (5 x + 9)^2 - 33 = -21
Add 33 to both sides:
4 (5 x + 9)^2 = 12
Divide both sides by 4:
(5 x + 9)^2 = 3
Take the square root of both sides:
5 x + 9 = sqrt(3) or 5 x + 9 = -sqrt(3)
Subtract 9 from both sides:
5 x = sqrt(3) - 9 or 5 x + 9 = -sqrt(3)
Divide both sides by 5:
x = sqrt(3)/5 - 9/5 or 5 x + 9 = -sqrt(3)
Subtract 9 from both sides:
x = sqrt(3)/5 - 9/5 or 5 x = -9 - sqrt(3)
Divide both sides by 5:
Answer:  x = sqrt(3)/5 - 9/5 or x = -9/5 - sqrt(3)/5
 
        
                    
             
        
        
        
Answer:
If you said its the height it would be 21
Step-by-step explanation:
The height is on the side
 
        
                    
             
        
        
        
Answer:
9. The graph will shift down 2 units
10. The graph will be moved right by 4 units
11.  The graph will be vertically stretched by 2 units
Step-by-step explanation:
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