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tatiyna
2 years ago
15

An arithmetic sequence has this recursive formula:

Mathematics
1 answer:
maria [59]2 years ago
3 0

Answer:

C

Step-by-step explanation:

C is the answer because a1=7 , d=-4 and so it's

an=an+(n-1)d

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3 years ago
A triangular playground has sides that are lengths 2x feet, x-1 feet and x feet. If the perimeter of this playground is 27 feet,
Keith_Richards [23]

Answer:

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At first, let us find the perimeter of the playground

∵ Perimeter of a triangle is P = S1 + S2 + S3

∵ The sides of the triangular playground are (2x) ft, (x - 1) ft, and x ft

∴ S1 = 2x, S2 = x - 1, S3 = x

→ Substitute them in the rule of the perimeter above

∵ P = 2x + x - 1 + x

→ Add the like terms

∴ P = (2x + x + x) - 1

∴ P = 4x - 1

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∴ S1 = 14 feet

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∵ S3 = 7 feet

∴ The lengths of the sides of the playground are 14 feet, 6 feet, 7 feet

7 0
2 years ago
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