Answer:
all fractions containing integers are rational numbers is true I believe. 
Step-by-step explanation:
 
        
                    
             
        
        
        
12c + 3a + 6d = total bill when d stands for dessert and a stands for appitizer and 12 stands for drinks and meals
        
                    
             
        
        
        
Answer: 18.75 for each girl
Step-by-step explanation:
First you take the unit rate 2.50 multiply by 5. 
2.50 x 5 = 12.50
12.50 x 3 = 37.50
37.50 / 2 = 18.75
 
        
             
        
        
        
Answer:
Athena = 10,265 km
Vesta = 102,650 km
Juno = 102,650 km
Ceres = 2,053,000 km
Apollo = 1,026,500 km
Step-by-step explanation:
Athena = 20,530 / 2 = 10,256
From there, you can work out the rest by multiplying accordingly.
Hope this helps and made sense! :)
 
        
             
        
        
        
D=228
when 2 numbers or variables are next to eachother it means you need to multiply. So in this case r=57 and t=4 and we mulitply. 57 x 4 = 228.  So the answer is 228. Hope this helps and have a great day!