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3 years ago

The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference. A.) 2 B.) 1.8 C.) 8/9

Mathematics

1 answer:

ruslelena [56]3 years ago

5 0

Answer:

d = 2

Step-by-step explanation:

Formula

l = a + (n - 1)d

Givens

n = 10

a = - 5

l = 13

Solution

13 = - 5 + (10 - 1)d Substitute

13+5 = -5+5 + 9d Add 5 to both sides

18 = 9d Divide by 9

18/9 = 9/d

d = 2

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