3 weeks
Step-by-step explanation:
To find the number of weeks, we have to equate the amount already saved and planned to save by both each week.
So we can write the expression as, 
 Let w be the number of weeks.
25 + 5w =16 + 8w 
Grouping the terms as, 
25 - 16 = 8w - 5w 
 9 = 3w 
Dividing both sides by 3, we will get, 
3w/3 = 9/3
  w = 3 
 So number of weeks = 3
 
        
             
        
        
        
6*12 = 72ft²
The area of the trampoline is 72ft²
Hope this helps! :)
        
             
        
        
        
Answer:
No she is not correct 
Step-by-step explanation:
She is not correct because “value of expressions” mean the result which for this it is 16-13 =3 and she is wrong. please mark me brainly! Hope this helps! :D
 
        
             
        
        
        
Answer:
4D - 1 
Step-by-step explanation:
So, if Ted saves $D for 4 weeks, then this amount will be equal to 4D because multiplication is simply repeated addition. We can imagine this situation as D+D+D+D, for the 4 weeks he is saving. We can simplify this to 4D in the expression.
Next, the question tells us that this will be 1 dollar more than needed. So, if we want to find the cost, we need to subtract that dollar.
Thus, the final expression is 4D - 1 because this represents 1 dollar less than the money he saves for 4 weeks.