X= fancy, y= plain 
x+y= 7
28x+ 15y=131
solve by substitution
        
             
        
        
        
D. 10 because if you replace x with 10, subtract it with 1 it equals 9. Then 9 divided by 3 equals three so k=3 which is correct
        
             
        
        
        
Answer:
30
Step-by-step explanation:
 
        
             
        
        
        
Answer:
j = 2z + 1
jennifer is one year older or jennifer is plus one.
twice zacks age or two times zacks age.
jennifer's age is two times zacks age plus one or
j = 2z + 1 
 
        
             
        
        
        
Answer:
78.75
Step-by-step explanation:
75% of 45 is  33.75 
45+33.75 = 78.75