Let Daniel's age be 'x' years , hence, Lisa's age is (x - 5) years. Let Grandma's age be 'y' = 54 years.
Hence,
x(x - 5) = 2/3 × y
x² - 5x = 2 × 54 years / 3
x² - 5x = 36 years
x² - 5x - 36 = 0
∆ = (-5)² - 4(1)(-36) = 25 + 144 = 169
√∆ = √169 = 13

x1 = (5+13)/2, x2 = (5-13)/2
x1 = 9, x2 = -4
Since, age can't be negative,
Daniel's age = x = 9 years.
 
        
        
        
4y+x= -1
-x -x
—————
4y=-x-1
— ——
4 4
=======
Y= -1/4x - 1/4
Hoped this helps
        
             
        
        
        
Answer:
Orange ribbon Zoe use is  
Step-by-step explanation:
Given:
Zoe had 3 1 /8 feet of orange ribbon. She used some ribbon to make a bow for a gift now she has 1 3 /8 feet of orange ribbon left. 
Now, to find the orange ribbon Zoe use.
Let the orange ribbon Zoe use be 
Total orange ribbon Zoe had = 
Ribbon Zoe had left = 
Now, to get the orange ribbon Zoe use:

<em>Subtracting both sides by </em> <em> we get:</em>
<em> we get:</em>

<em>Adding both sides by </em> <em> we get:</em>
<em> we get:</em>






Therefore, orange ribbon Zoe use is 
 
        
             
        
        
        
I can't exactly understand what you mean but what I thought you put in the answer is 40