Step-by-step explanation:
a1 = 4
a2 = 4 + c
a3 = 4 + 2c
a10 = 4 + 9c = 67 --> c = 7
(1, 4) ; (10, 67)
m = (y2 - y1) / (x2 - x1) = (67 - 4) / (10 - 1) = 63/9 = 7
Answer:
Step-by-step explanation:
This is an arithmetic sequence because each term subtracted by the previous term is a constant called the common difference.
an=a+d(n-1) where a is the initial term and d is the common difference
a=-20 and d=-16+20=4 so
an=-20+4(n-1)
an=4n-24
The sum of an arithmetic sequence is the average of the first and last terms times the number of terms
sn=(a1+an)(n/2)
s30=(-20+4(30)-24)(30/2)
s30=1140
Answer
What is the question
Cause otherwise we can’t help
Answer:b
Step-by-step explanation:
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