Answer:
15 
Step-by-step explanation:
Substitute a and b then
Follow PEMDAS 
Hope this helps! :) 
 
        
                    
             
        
        
        
Answer:
you do your letters first then your other math
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x = 45°
Step-by-step explanation:
We can tell that "x + 115" and 160° are vertically opposite angles, which means that they are equal. (Refer to image)
⇒ x + 115 = 160
⇒ x = 160 - 115
⇒ x = 45°
Learn more about vertically opposite angles: brainly.com/question/68367
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Image:</h3>
 
        
                    
             
        
        
        
I will assume that this question is about scientific notation (also assuming that the first number is 3.4*10^2), where you can arrange the numbers by the exponent of the 10, so from least to greatest:

, 

, 435, and 
 
 
        
        
        
The scale is that 3 the force is going on a colicky of 350