Alright well first off, converting Celsius to Fahrenheit is 1.8c+32. converting Fahrenheit to Celsius is 5(f-32)/9.
the temperature in Fahrenheit is given by °f. 
40°c is equal to 104°f.
        
             
        
        
        
Remember you can do anything to an equation as long as you do it to both sides
(y/4)-49=-9
isolate the variable
add 49 to both sides
y/4=40
multiply both sides by 4 to clear fraction
y=160
        
                    
             
        
        
        
Answer:
2,5
Step-by-step explanation:
 
        
                    
             
        
        
        
Obtaining thevslope you get 6/5. so
9=-24/5 +n
= 
y=6/5x + 21/5
        
             
        
        
        
Answer:
C (circumference) =2×π×r
we've got a 30-60-90 triangle
which means 9=d√3, d=5.19 exact inches
or ≈5.20 inches
d=2r, r=5.20÷2≈2.60 inches
C=2×3.14×2.60≈16.328