Due to pemdas you would have to start with multiplication. 3×12= 36. Then you do addition which would be 9+36= 45.
        
                    
             
        
        
        
Isaiah will mow 9 lawns in 3 hours at the given rate.
Step-by-step explanation:
Given, 
Lawns mowed in 25 hours = 75 lawns 
We will find unit rate in terms of lawns;
75 lawns = 25 hours 
1 lawn = 
9 lawns = 
9 lawns = 3 hours 
Isaiah will mow 9 lawns in 3 hours at the given rate.
Keywords: unit rate, fraction
Learn more about fractions at:
#LearnwithBrainly
 
        
             
        
        
        
Answer:
Soooo what's the question?
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
19/30
Step-by-step explanation:
1/5 + 2/15 + 3/10
We need the LCD of 5, 15, and 10. 
LCD = 30
1/5 + 2/15 + 3/10 =
= 6/30 + 4/30 + 9/30
= 19/30
Answer: 19/30