Answer:
x(3 + 9) = 3x + 9x = 12x
Step-by-step explanation:
...........
 
        
             
        
        
        
Answer:
meter and then gallon 
Step-by-step explanation:
i hope this helps :)
 
        
                    
             
        
        
        
Try photo math or google it. Best luck!
        
             
        
        
        
Answer:
<em>The ball's speed will be 10 m/s at t=1.22 seconds</em>
Step-by-step explanation:
The vertical motion of an object is controlled by the force of gravity. This means that there is a non-zero net force acting on the object that makes it accelerate downwards.
If the object is thrown upwards at speed vo, its speed at time t is:

Where g is the acceleration of gravity 
Our ball is thrown upwards with v0=22 m/s. We need to calculate the time when its speed is vf=10 m/s.
Solving the above equation for t:

Substituting:

t=1.22 seconds
The ball's speed will be 10 m/s at t=1.22 seconds
 
        
             
        
        
        
Ok first we can split it in two : 

 and 

.
The derivative of 

 is 3.
For the first part, we use the chain rule : 
![[f(g(x))]'=g'(x)f'(g(x))](https://tex.z-dn.net/?f=%5Bf%28g%28x%29%29%5D%27%3Dg%27%28x%29f%27%28g%28x%29%29)
 hence 

 (since the derivative of the exponential is itself) hence 
