1:2:3:4= 4:8:12:16 
Explanation: 
Add 1,2,3,4 then divide by 40 which gives you 4.
Then put those in the ratios given :)
        
             
        
        
        
Answer:
Tickets sold:
VIP 
$17 tickets 
$21 tickets 
Step-by-step explanation:
Let x be the number of VIP tickets.  
If ten times as many $17 tickets were sold as VIP tickets, then the number of $17 tickets is  
 
If the number of $17 tickets sold was 57 more than the sum of the number of $21 tickets and VIP tickets, then  and the number y of $21 tickets is
 and the number y of $21 tickets is 
Amounts earned:
VIP tickets 
$17 tickets 
$21 tickets 
Total 
The sales of all three kinds of tickets would total $51,471, so

Tickets sold:
VIP 
$17 tickets 
$21 tickets 
 
        
             
        
        
        
When rounding, look to the next place to the right of what you are rounding to... for example if you are rounding to the nearest hundredth, look to the thousandths place to see if the hundredths place rounds up or down. Since your number, 615.44 stops on the hundredths place, the thousandths place is automatically zero, so your number stays the same.
615.44
        
             
        
        
        
Answer:
Each classmate received 1/16
Step-by-step explanation:
5/8= 0.625
0.625 ÷ 10 = 0.0625
= 1/16
 
        
             
        
        
        
Answer:
7. b
8. a
Step-by-step explanation: