Answer:
x=13
Step-by-step explanation:
1. divide both sides by 3
2. simplify: 4x-7=45
3. add 7 to both sides
4. 4x=52
5. divide both sides by 4
6. x=13
 
        
             
        
        
        
Answer:
N = 18
Step-by-step explanation:
The triangles are similar, thus the ratios of corresponding sides are equal, that is
 =
 =  ( cross- multiply )
 ( cross- multiply )
5N = 90 ( divide both sides by 5 )
N = 18
 
        
             
        
        
        
Answer:
624
Step-by-step explanation:
the area of the triangles:
12*10 = 120 
120/2 = 60
since there are 2 triangles of the same dimensions that make up the surface area 60 + 60 = 120
area of the rectangles:
13*14 = 182
since there are 2 rectangles of the same dimensions 182 + 182 = 364
The last rectangular:
10*14 = 140
add all areas:
120 + 364 + 140 = 624
 
        
                    
             
        
        
        
250*0.62= 155
155 pounds is your answer.