Which statement shows the associative property of addition?

Mathematics

1 answer:

Hitman42 [59]4 years ago

5 0

The associative property of addition is shown by answer B.

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Find the SUm of the infinite series.

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I'll do problem 13 to get you started.

The expression $4\left(\frac{2^n}{7^n}\right)$ is the same as $4\left(\frac{2}{7}\right)^n$

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This is so we can get the expression in a(r)^(n-1) form

a = 8/7 is the first term of the geometric sequence
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Note that -1 < 2/7 < 1, which satisfies the condition that -1 < r < 1. This means the infinite sum converges to some single finite value (rather than diverge to positive or negative infinity).

We'll plug those a and r values into the infinite geometric sum formula below

S = a/(1-r)

S = (8/7)/(1 - 2/7)

S = (8/7)/(5/7)

S = (8/7)*(7/5)

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S = 1.6

------------------------

Answer in fraction form = 8/5

Answer in decimal form = 1.6

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How do you solve this

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First add both number with x and then add both number with y and then add both numbers which is the answer to both equations and that is called linear combination.

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Please help me with this!! :D

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Answer:

A: 90

Step-by-step explanation:

Hopefully this helps!

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