Answer:
look in the explanation, it is in there
Step-by-step explanation:
i don't know if you are distributing or just using PEMDAS .
if you are distributing then: do in the equation 4(r + 1) + 3r.. do 4 x r and 4 x 1 , now you have 4r + 4 + 3r
                         7r +4
                       is what i got!
If you are doing PEMDAS then: first you do what is inside the perenthisis () 
4(r + 1) +3r changes into
4( r1 ) + 3r now you do multipulcation because that in the "M" in pemdas
 4r + 3r, then if you are using like terms you would add them
7r
i hope this helps you out!
 
        
                    
             
        
        
        
Answer:
heyyyyy !!!!! whats the question????? ......
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Your answer for F will be 13.
Step-by-step explanation:
Take 11.2 and add it to 1.8, and you will get 13 and 13 will be the variable (f). So, f (13) - 1.8 = 11.2
Hope this helps! :D
 
        
             
        
        
        
Answer:
A
Step-by-step explanation: