Answer:
20 years old
Step-by-step explanation:
Joe = J
Sydney = S
J = 5 + S
J + S = 45
Substitute
5 + S + S = 45
Add
5 + 2S = 45
Subtract 5 from both sides of the equation
2S = 40
Divide both sides of the equation by 2
S = 20
Sydney is 20 years old
Hope this helps :) 
 
        
             
        
        
        
Answer:
4(3)+0.95=X
Step-by-step explanation:
 
        
                    
             
        
        
        
what upAnswer:
Step-by-step explanation:
 
        
             
        
        
        
Answer: hi
Step-by-step explanation:
 
        
             
        
        
        
Answer:
no
Step-by-step explanation:
y = 3x
Substitute the point into the equation
2 = 3*0
2 =0
This is not true so the point is not a solution