2 years ago

4) An arithmetic sequence has a 7th term of 54 and a 13th term of 94. Find the common difference

1 answer:

6 0

Answer:

20/3

Step-by-step explanation:

Every nth term takes the form of a + n*d, where a is the first term.

So 7th term = (54 = a + 7d), 13th term = (94 = a + 13d).

equate them both:

94 - 13d = 54 - 7d

40 = 6d

d = 40/6

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