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Natali [406]
3 years ago
12

Find the common difference if the 8th term is 55 and the first term is 13

Mathematics
1 answer:
Vlad [161]3 years ago
6 0

Answer:

Step-by-step explanation:

Equation

L = a + (n - 1)*d

Givens

L = 55

a = 13

n =8

Solution

55 = 13 + (8 - 1)*d               Combine

55 = 13 + 7d                       Subtract 13 from both sides

55 - 13 = 7d

42 = 7d                               Divide by 7

d = 6

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