Here is my calculation:
30 x 10= 300
        
             
        
        
        
Answer:
x=−2
Step-by-step explanation:
−2x+5−5=9−5
−2x=4
-2x/-2 = 4/-2
x=−2
 
        
             
        
        
        
Answer:
12.5
Step-by-step explanation:i did that problem before
 
        
             
        
        
        
 Answer
just reverse it. if you already have the long side plug it into the equation a2+b2=c2. and instead of adding youd subtract
Step-by-step explanation: