Answer:
 = 1
 = 1
Step-by-step explanation:
The n th term of an arithmetic progression is
 = a + (n - 1)d
 = a + (n - 1)d
where a is the first term and d the common difference
use the 9 th term and 7 th term to find a and d
 = a + 8d =
 = a + 8d =  → (1)
 → (1)
 = a + 6d =
 = a + 6d =  → (2)
 → (2)
Subtract (2) from (1) term by term
2d =  ⇒ d =
 ⇒ d = 
Substitute this value into (2) and solve for a
a +  =
 = 
a =  -
 -  =
 = 
Hence
 =
 =  +
 +  = 1
 = 1
 
        
             
        
        
        
Answer:
x = 1
y = -1
Point = (1,-1)
Step-by-step explanation:
2x + 3y = -1   =   y = -2/3 - 1/3
5x + 2(-2/3 - 1/3) = 3
5x - 1 1/3 - 2/3 = 3
5x - 2 = 3
<u>     +2    +2</u>
5x = 5
<em><u>x = 1</u></em>
2(1) + 3y = -1
2 + 3y = -1
<u>-2           -2</u>
3y = -3
<em><u>y = -1</u></em>
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
the more people who would've surveyed then the graph would be at the same rate.