Answer:
1 plain = $0.75; 1 cheese = $0.95; 1 super = $1.25
Step-by-step explanation:
We have three conditions
(1) 5P = 3S
(2)  S = C + 0.30
(3)  P = C – 0.20                           Substitute (3) into (1)
=====
(4)   5(C – 0.20) = 3S                   Substitute (2) into (4)
       5(C – 0.20) = 3(C + 0.30)     Remove parentheses
          5C – 1.00 = 3C + 0.90       Add 1.00 to each side
                     5C = 3C + 1.90        Subtract 3C from each side
                     2C = 1.90                 Divide each side by 2
                       C = $0.95              Substitute C into Equation (2)
=====
                       S = 0.95 + 0.30
                       S = $1.25               Substitute C into Equation (3)
=====
                      P = 0.95 – 0.20
                      P = $0.75
1 plain = $0.75; 1 cheese = $0.95; 1 super = $1.25
 
        
             
        
        
        
C. both a and b would be the best answer
        
             
        
        
        
9514 1404 393
Answer:
   a)  C  x +x +x +3x +3x = 18
   b)  x = 2
   c)  2 cm, 6 cm
Step-by-step explanation:
a) The sum of the lengths of the sides is equal to the length of the perimeter. The appropriate equation is ...
  x +x +x +3x +3x = 18
__
b) Simplifying, the equation becomes ...
   9x = 18
   x = 2 . . . . . divide by 9
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c) The shorter sides are x = 2 cm.
The longer sides are 3x = 6 cm.
 
        
             
        
        
        
I believe that the answer would be 45
 
        
             
        
        
        
Answer:
3
Step-by-step explanation: