Number 8 is 24 hope I help please give me brainiest<span />
        
             
        
        
        
THE FIRST ONE AND THE LAST ONE
        
             
        
        
        
Answer:
$6
Step-by-step explanation:
In order to find the amount of the tip that T.J. and Lindsey will leave for their waiter, you have to multiply the lunch cost for the percentage they want to leave as a tip for their waiter:
Lunch cost=$30
Percentage they want to leave as a tip= 20%
$30*20%=$6
According to this, the answer is that the amount of the tip is $6.