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4vir4ik [10]
4 years ago
7

Find the first term of the arithmetic sequence in which a28=423/4 and the common difference is 5/4

Mathematics
2 answers:
pychu [463]4 years ago
8 0

Answer:

B

Step-by-step explanation:

givi [52]4 years ago
4 0

Answer:

B) 72

Step-by-step explanation:

The n-th term of an arithmetic sequence An = a1 + (n - 1) d

Given :

a28 = 423/4 and d = 5/4

So

a28 = a1 + (28 - 1)5/4

Now plug in a28 = 423/4

423/4 = a1 + 27(5/4)

a1 = 423/4 - 27(5/4)

= 423/4 - 135/4

a1 = (423-135)/4

a1 = 288/4

a1 = 72

Thank you.

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Dafna11 [192]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
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liubo4ka [24]

Answer:

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Step-by-step explanation:

Given,

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Solution,

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The theorem of parallel lines states that,

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djyliett [7]
The answer in the picture
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8 0
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Step-by-step explanation:

7 0
3 years ago
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Answer:

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Step-by-step explanation:


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