Answer:
6. X= 121
7. x= 18
8. X= 7
9. x= 31
Step-by-step explanation: do u need the steps?
Answer:
33
Step-by-step explanation:
Answer:
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Step-by-step explanation:
XD
Answer:
First term = -41.
Common difference = -15.
Step-by-step explanation:
nth term: an = a1 + (n - 1)d where a = first term and d = the common difference.
-671 = a1 + (43 - 1)d
-806 = a1 +(52 - 1)d
-671 = a1 + 42d
-806 = a1 + 51d
Subtracting ( to eliminate a1):
-671 - (-806) = 42d - 51d
-9d = 135
d = -15
Substitute for d in the first equation:
-671 = a1 + 42*-15
-671 = a1 - 630
a1 = -671 + 630 = -41.
All of the values follow the same formula rule. n= n x (n-1) / 2
Use this formula to find the number of segments.