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3 years ago

Find the 25th term of the arithmetic sequence when a1 = -14 and d = -5

Mathematics

1 answer:

rosijanka [135]3 years ago

6 0

Answer:

a25 = -134

Step-by-step explanation:

For first term a1 and common difference d, the formula for the n-th term is ...

an = a1 + d(n -1)

You want to evaluate this for n=25, a1=-14, d=-5. Filling in the numbers and doing the arithmetic, you get ...

a25 = -14 -5(25 -1) = -14 -120

a25 = -134

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Answer:

The pencil marks on your page show you exactly how to do that.

Step-by-step explanation:

Take advantage of two rules of exponents:

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Question

The exchange rate at the post office is £1=€1.17 how many euros will you get for £280

Answer:

Step-by-step explanation:

you can solve with an equation

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1 : 1.17 = 280 : x

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or you can simpy solve with a multiplication

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Given :

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