Answer:
let the daughter age be x 
let mother age be 3x
Step-by-step explanation:
x+3x= 80
4x = 80
x= 80\4
x=20
daughter age is 20
mather age= 80 -20
 = 60
daughter age 20
mother age 60
 
        
             
        
        
        
Answer:
Total Paperback books = 8x , where x is any positive number
Step-by-step explanation:
Let
The total books are = 13x   ; where x is any positive number
As given,
The ratio of hardback books to total books is 5 to 13.
⇒Hardback books =  × Total books
× Total books
⇒Hardback books =  × 13x = 5x
× 13x = 5x
So, Paperback books = Total books - Hardback books 
                                     = 13x - 5x 
                                     = 8x
⇒Total Paperback books = 8x
 
        
             
        
        
        
He needs 3 Tickets to Win a Prize.27×2 is... And that's ur Answer
        
             
        
        
        
Answer:
your answer would be D. x = 2.5 + y
Step-by-step explanation:
 
        
                    
             
        
        
        
It could also be 8.23592 x 10 ^ 5