Since ∠2=60° = ∠8 so it will also be 60 °
the sum of the both are 60°+∠7=180°
 ∠7= 180°- 60° = 120°
        
                    
             
        
        
        
<u>Answer:</u>
The correct answer option is: 19, 13, 3, -11, -29.
<u>Step-by-step explanation:</u>
We are given the following explicit formula for an arithmetic sequence:

So to find the first five terms of this sequence, we will substitute the values of  (num here in the given formula:
 (num here in the given formula:





Therefore, the first five terms of the sequence defined by the explicit formula  are 19, 13, 3, -11, -29.
 are 19, 13, 3, -11, -29.
 
        
                    
             
        
        
        
Answer:
 2x +21
Step-by-step explanation:

 
        
             
        
        
        
This is a geometric sequence of the form:
a(n)=(x+3)(-2x)^(n-1)  because each term is -2x times the previous term...so
a(8)=(x+3)(-128x^7)
a(8)=-128x^8-384x^7
        
                    
             
        
        
        
Answer:
16
Step-by-step explanation:
8 × 4 = 32
32 ÷ 2 = 16
hope this helps...