Answer:
0.84
Step-by-step explanation:
Use a calculator.  That would be 0.84.
                                3*21
Note that 63/75 = ---------- = 21/25.  Multiplying top and bottom by 4 results 
                                 3/25                   in 0.84 (so this answer checks out ok)
 
        
             
        
        
        
Answer:
Is important to remember that the reflection of the point (a,b) across  the y-axis is the point (-a,b). 
Our original equation is 
And after the reflection respect x we got:

Step-by-step explanation:
Is important to remember that the reflection of the point (a,b) across  the y-axis is the point (-a,b). 
Our original equation is 
And after the reflection respect x we got:

 
        
             
        
        
        
Answer:
2, 4, 5
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The original piece of wood is 108 cm 
Step-by-step explanation:
From the given ratio, the shortest is of the ratio 5 and the longest is of the ratio 7
Let the original piece of wood be x
so the sum of the ratios will be;
5 + 6 + 6 + 7 = 24
the shortest length would be 5/24 * x
= 5x/24
the longest will be 7/24 * x = 7x/24
From the question;
7x/24 -5x/24 = 9
(7x-5x) = 24(9)
2x = 24(9)
x = (24 * 9)/2
x = 108 cm 
 
        
             
        
        
        
Answer:
x=18
Step-by-step explanation:
Vertical angles are congruent. This means that they are equal to each other. So, to solve set them equal to each other and isolate x. First, set up the equation. Then, subtract x from both sides. Finally, add 11 to both sides and simplify. 
1) 
2) 
3)