Answer:

Step-by-step explanation:
 
        
             
        
        
        
Answer:
-26042
Step-by-step explanation:
sum of a finite geometric series = 

here, a1 is the first term, r is the common ratio, and n is the number of terms
a1 = -2
r = -5
n = 7

 
        
             
        
        
        
Answer:
Step-by-step explanation:
Where a graph intersects the x-axis is where the solutions or zeros of the quadratic are found...where y = 0.
If the points of intersection are x = -1 and x = 3, then putting those into factors gives us (x + 1)(x - 3) = 0.  FOIL that out to get the quadratic.
 which simplifies to
 which simplifies to

Looks like the third option there.
 
        
             
        
        
        
So basically just add the equations to get rid of y. Then solve for x and plug into one of the equations for y. (1,4)