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Lina20 [59]
3 years ago
9

Is -3,12,-48... a arithmetic or geometric formula

Mathematics
1 answer:
Agata [3.3K]3 years ago
4 0

Answer:

  geometric sequence

Step-by-step explanation:

A list of 3 numbers is not a "formula". It is a "sequence."

The differences between the numbers are ...

  12 -(-3) = 15

  -48 -12 = -60

These are not constant, so the sequence is not arithmetic.

__

The ratios between the numbers are ...

  12/-3 = -4

  -48/12 = -4

These are constant, so the sequence is geometric.

__

The formula for the n-th term of a geometric sequence is ...

  an = a1·r^(n-1)

We have first term a1 = -3 and common ratio r = -4. So, the formula for this sequence is ...

  an = -3(-4)^(n-1)

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Answer l=69m

Step-by-step explanation:

l= A/w= 3657/53=69m

use the formula A=wl

4 0
2 years ago
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What is the greatest common factor of 30, 22, and 8?
Nimfa-mama [501]

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2

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just because all three numbers are even

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How much would it be $55 for every 15 shirts?
notsponge [240]

Answer:

<h3>$825 it would be that</h3>

Step-by-step explanation:

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3 years ago
A marketing consultant was in the process of studying the perceptions of married couples concerning their weekly food expenditur
lara31 [8.8K]

Answer:

We have sufficient evidence to conclude at α = .05 that the husband’s perception would be higher than the wife’s.

Step-by-step explanation:

The hypotheses testing procedure in the given scenario is

H0: Husband’s perception would be similar to the wife’s i.e. μh=μw

Ha: Husband’s perception would be higher than the wife’s i.e. μh>μw

Level of significance: α=0.05

Test statistic: t=2.776

Critical region: t>t(0.05,9)=1.833

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3 years ago
If two thirds of a number decreased by 20 is 40, what is the number
oee [108]

Answer:

The unknown number is 90

Step-by-step explanation:

This question requires a good understanding so as to interprets it well

And always ensure that all symbols used in representation are well stated so as to help the examiner or anyone who will mark it to understand better

So back to the question,let the unknown number be x

And two thirds of the unknown number is 2/3x

2/3x was decreased by 20 which can be written as 2/3x-20

And this decrease gives 40

That's,2/3x-20=40

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Cross multiply

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Divide both sides by 2

x=90

Therefore the final answer is 90

8 0
3 years ago
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