Answer:
12
Step-by-step explanation:
you can pack one pack in 20 min
there are three 20 min in one hour
multiply three times the four hours and you get 12
 
        
             
        
        
        
Answer:
4 people
Step-by-step explanation:
Let's first write an equation.
We want to find the number of tickets t
The total was $49 so our equation will equal $49 and they spent $15 in snacks so on the other side of the eqaution we have to add $15, on the same side as the snacks we need to add in the cost of tickets, which is $8.50 multiplies by t, or the total number of tickets.
$49 = $8.50t + $15
Solve for t, first subtract $15 from both sides.
$49 - $15 = $8.50t
$34 = $8.50t   Divide both sides by $8.50
$34/$8.50 =  $8.50t/$8.50   
$34/$8.50 = t
4 = t
4 tickets meaning 4 people went. 
 
        
             
        
        
        
Hello : 
<span>4x-5y=13...(1)
x+5y=-3...(2)
(1)+(2) : 5x = 10
x=2
subsct in (2) : 2+5y = -3
5y =-5
y = -1
</span>