So
a be first term and d be common difference
- a+a+2d+a+4d+a+6d+a+9d=17
- 5a+21d=17--(1)
And
- a+d+a+3d+a+5d+a+7d+a+9d=15
- 5a+25d=15--(2)
Eq(1)-Eq(2)
Put in second one
- 5a+25d=15
- a+5d=3
- a+5/2=15
- a=15-5/2
- a=25/2
 
        
             
        
        
        
Answer:
it is the reflection in the x-axis
Step-by-step explanation:
 
        
             
        
        
        
<span>9*45
= 9(40 + 5)
= 360 + 45
= 405
answer
</span>Distributive property of 9*45 =  9(40 + 5)