Answer: the solution is 1
Step-by-step explanation:
you subtract the 8 from 9 so you can get  the variable, y, by itself.
 
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
20 x 15 is 450 and add it to the semi circle which us 88.4
Hope this helps u :D
 
        
                    
             
        
        
        
X - 2y = -10 -->   x = 2y -10
3x + 5y = 25 --> 3(2y-10) + 5y = 25 --> 11y - 30 = 25 --> 11y = 55 --> y = 5
x = 2y -10 --> x = 2(5) -10 --> x =10 -10 --> x =0
Answer (0,5)
        
             
        
        
        
The volume of a rectangular pyramid = 1/3 ×Area×height 
=1/3×L×W×H 
if the dimensions were doubled 
therefore, 
V=1/3 × (9×2)×(14×2)×(10×2)
=1/3×18×28×20
=3360 cubic centimetres