Answer:
I think system 4 has no solution
Step-by-step explanation:
I'm sorry if you get it wrong
 
        
                    
             
        
        
        
Answer:
1 1/4 is the answer 
Step-by-step explanation:
Hope this helps :)) 
 
        
             
        
        
        
The value of y-x is (-3)
<u>Solution:</u>
Given: The value of x-y=3
To find: The value of y-x

Let's multiply the equation (1) by (- 1) on both sides,


On multiplying the sign,

The above equation can also be written as,

<u>Multiplication of signs:</u>




In simpler terms, when we multiply two integers with the same signs, the result is always positive and when we multiply two integers with different signs, the result is always negative.
 
        
             
        
        
        
Answer: she is NOT correct the answer should be X= 19
How?:
the equation was 5x = 95 
the 5 and x is being multiplied the opposite of multiplication is dividing 
so 95/5= 19
therefor x= 19 and NOT 90
 
        
                    
             
        
        
        
Answer:
The length of the edge of the cube = 4 inches
Step-by-step explanation:
* Lets describe the cube
- It has 6 faces all of them are squares
- It has 8 vertices
- It has 12 equal edges
∵ The volume of any formal solid = area of the base × height
∵ The base of the cube is a square
∴ Area base = L × L = L² ⇒ L is the length of the edge of it
∵ All edges are equal in length
∴ Its height = L
∴ The volume of the cube = L² × L = L³
* Now we have the volume and we want to find the 
  length of the edges
∵ Its volume = 64 inches³
∴ 64 = L³
* Take cube root to the both sides
∴ ∛64 = ∛(L³)
∴ L = 4 inches
* The length of the edge of the cube = 4 inches