I’m pretty sure you just solve exactly like that 
-7(-2)-1 =13 at least I’m told that \_( •-• )_/
        
             
        
        
        
Answer:
18.84
Step-by-step explanation:
The formula for circumference is 2(pi)r, I think. The radius is 3. 3 times 2 is 6. 6 times 3.14 is around 18, I think.
 
        
             
        
        
        
$12 each. $75 - $39 = $36. $36 divided by 3 = $12. Assuming he used all his money.
 
        
             
        
        
        
70 liters ÷ 100 samples= 0.7 or 7/10 liter per sample 
Hope this helps! :)
        
                    
             
        
        
        
<span>Compute unit rates associated with ratios of fractions, including ratios of lengths, areas and other quantities measured in like or different units. For example, if a person walks 1/2 mile in each 1/4 hour, compute the unit rate as the complex fraction 1/2/1/4 miles per hour, equivalently 2 miles per hour. ... hope this helps.</span>