10+8/2-4
PEMDAS
parenthasese
exxonents
multiplication or  division 
addiotn or subtration next
10+8/2-4
8/2 first
4
10+4-4
add
10+4=14
minus
14-4=10
answer is 10
        
             
        
        
        
Multiply the volume by 3.
Multiply the height by π, which is a numeric constant that begins 3.14 and never terminates.
<span>Divide the tripled volume by the product of the height and π.
</span><span>Find the square root of the result from the 3rd step
</span>
hope this helped:)
        
                    
             
        
        
        
Collect like terms
 -3w - 7 w =5
Divide both sides by -10
 -10w =5
w = -1/2