Dy/dx = dy/dt / dx/dt
dy/dx = 12x^2 + 4 
when x = 2 , dydx = 52
52 = dy/dt / 3
so dy/dt =  156 (answer)
        
             
        
        
        
Answer:
12ft
Step-by-step explanation:
Hope I helped!
May you give me brainliest if it is right?
 
        
             
        
        
        
Step-by-step explanation:
x=−y−2z+3
x=y+32z+1
x=13y+23z+13
 
        
             
        
        
        
Answer:
40%
Step-by-step explanation:
12 divided by 30 will give you 0.4
 
        
             
        
        
        
Answer:
AC ≈ 5.03 
Step-by-step explanation:
We can solve the problem above using the trigonometric ratio, they are;
SOH CAH TOA
sin Ф = opposite / hypotenuse
cosФ= adjacent/ hypotenuse
tan Ф = opposite / adjacent
From the diagram above, in reference to angle B;
opposite =AC     and   adjacent =BC
Since we have opposite and adjacent, the best formula to use is 
tanФ = opposite / adjacent
tan B = AC  / BC
tan 40 =  AC/ 6
Multiply both-side of the equation by 6
6× tan 40   =  AC/ 6  ×  6
At the right-hand side of the equation, 6 will cancel-out 6 leaving us with just AC
6×tan 40 = AC
 5.034598  = AC
AC ≈ 5.03   to the nearest hundredths