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Shalnov [3]
4 years ago
11

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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atroni [7]
27.5/100 simplified is 11/40! I am postive! Good Luck! (Can I be the brainlest?)
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4 years ago
Read 2 more answers
Find the SUm of the infinite series.
givi [52]

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

Then we can do a bit of algebra like so to change that n into n-1

4\left(\frac{2}{7}\right)^n\\\\4\left(\frac{2}{7}\right)^n*1\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{0}\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{1-1}\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{1}*\left(\frac{2}{7}\right)^{-1}\\\\4*\left(\frac{2}{7}\right)^{1}\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{-1}\\\\\frac{8}{7}\left(\frac{2}{7}\right)^{n-1}\\\\

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
  • r = 2/7 is the common ratio

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)

S = 8/5

S = 1.6

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

Answer in fraction form = 8/5

Answer in decimal form = 1.6

7 0
3 years ago
How do you solve this
ella [17]
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.
4 0
4 years ago
Please help me with this!! :D
Sedbober [7]

Answer:

A: 90

Step-by-step explanation:

Hopefully this helps!

3 0
3 years ago
The gardener is told that he must increase the height of his fences 40% if he wants to keep the deer from jumping in to eat the
Dovator [93]

Answer:2.8 m

Step-by-step explanation:

Given

The current fence height id 2 m

The gardener is told that he must increase the height of his fence by 40%

so new height is 2+2\times 40%

=2+2\times 0.4

=2\left ( 1+.4\right )

=2\left ( 1.4\right )

=2.8 m

4 0
3 years ago
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