Answer:
the answer is 20 cups of sugar
Step-by-step explanation:
 
7/28= 5/x
x= 20.
x reps the number of cups of sugar
 
        
             
        
        
        
Answer:
90 arrangements
Step-by-step explanation:
Since there are no repititions of letters, there are unique  10 letters in total.
THe number of arrangements would be 2 permutation 10. We need the formula for permutation. That is:

Now, n = 10 [total] and r is 2, so we have:

So, there can be 90 arrangements
 
        
             
        
        
        
Answer: 56 large cars and 86 small cars.
Step-by-step explanation:
 Let's call:
  : the number of large cars.
: the number of large cars.
  : the number of small cars.
: the number of small cars.
 Then, you can set up the following system of equations:
 
 You can use the Elimination Method:
 - Multiply the first equation by -4.0
 - Add both equations.
 - Solve for l.
 
  ≈
≈
 Substitute  into one of the original equations and solve for <em>s:</em>
 into one of the original equations and solve for <em>s:</em>
<em> </em>
 
        
             
        
        
        
4/5=0.8
1/50=0.02
 Hope that helps