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Firdavs [7]
3 years ago
13

WILL GIVE BRAINLIEST write an equation for the nth term of the arithmetic sequence and find the 30th term 28, 25, 22, 19, ... (s

how your work pls)
Mathematics
2 answers:
ryzh [129]3 years ago
6 0

Answer: 31 - 3n

Step-by-step explanation:

step one:

25 - 28 = -3

22 - 25 = -3

19 - 22 = -3

d = -3

Step two:

An = a1 + (n-1) d

= 28 + (n-1) -3

= 28 - 3n + 3

= 31 - 3n

a1= 28 d = 3

Maksim231197 [3]3 years ago
5 0

Answer:

-59

Step-by-step explanation:

formula= a+(n-1) d

where:

a= no. of 1st term

n= no. of term

d= common difference

so,

T(30)=28+(30-1)(-3)

T(30)=28-90+3

T(30)=(-59)

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