Sum is add
sum of x and 2 means x+2
nothing to it
        
             
        
        
        

the first step is to deal with the negative exponents, which causes numbers to go to the other side of the fraction
8x^{-9}+(-3x^{-3}y^{-2})(\frac{5}{x^6y^{-2}})
goes to

now we can simplify the multiplied terms

Now that we have common bases, we can add the 2 fractions together to get

 
        
             
        
        
        
Answer:
70
Step-by-step explanation:
 
        
             
        
        
        
<span>A high school baseball team averaged 800 fans for each of its seven home games. What is the order of magnitude of the total attendance?
The answer is B. 3</span>
        
                    
             
        
        
        
Answer:
4.5
Explanation:
I’ve attached my work below
Hope it helps, Let me know if you have any questions !