Answer:
x=10
Step-by-step explanation:
The two triangles are similar since each triangle is the same shape of right triangle but different sizes. To find x, write a proportion between two equal ratios of side lengths.

Solve by cross multiplying.
28(3x) = 20(4x+2) 
84x = 80x + 40
4x = 40
x=10
 
        
                    
             
        
        
        
I can’t understand because I speak English
        
             
        
        
        
Answer + step-by-step explanation:
7/10 as a decimal would be 0.7.
7/10 or 0.7 in a word form would be seven tenths.
<em><u>Hope this helps, if my answer or explanation is wrong  </u></em>
<em><u>feel free to message me in the comments :).</u></em>  
- genius423
 
        
             
        
        
        
Answer:
-8
Step-by-step explanation:
3+8+8-2=17
7+4+5+1=17
10+12+3+x=17
x=17-25
 =-8
 
        
             
        
        
        
Answer:
7 students.
Step-by-step explanation:
10% of 70 is 7.