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AVprozaik [17]
3 years ago
11

A ratio is a comparison of two numbers by addition. always sometimes never

Mathematics
2 answers:
vesna_86 [32]3 years ago
6 0
<span>A ratio is never a comparison of two numbers by addition.  [never]</span>
Viktor [21]3 years ago
3 0

Answer:

C) never

Step-by-step explanation:

A ratio is a comparison of two things with their numbers by division.

The ratio can be written as a:b, a/b and a to b.

The ration cannot be compared by addition.

Therefore, answer is C ) never

Thank you.

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Which equation does not have the same solution as the others?
dem82 [27]
<span>The answer is B. X-9=17 
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6 0
3 years ago
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Find x such that x - 4, x, and 3x - 8 are three consecutive terms in a geometric sequence
Nitella [24]
In a geometric sequence dividing any term by the term before it yields the common multiplier.
Then x/(x+8) = (3x-8)/x
Solving for x:  reduces to x^2-10x +16 factor into (x-2)(x-8)
Then x = 2 or 8
2 produces a sequence of -2, 2, -2 ...
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8 0
3 years ago
What term is 1/1024 in the geometric sequence,-1,1/4,-1/6..?
Trava [24]

Answer:

\large\boxed{\text{sixth term is equal to}\ \dfrac{1}{1024}}

Step-by-step explanation:

The explicit formula for a geometric sequence:

a_n=a_1r^{n-1}

a_n - n-th term

a_1 - first term

r - common ratio

r=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=...=\dfrac{a_n}{a_{n-1}}

We have

a_1=-1,\ a_2=\dfrac{1}{4},\ a_3=-\dfrac{1}{6},\ ...

The common ratio:

r=\dfrac{\frac{1}{4}}{-1}=-\dfrac{1}{4}\\\\r=\dfrac{-\frac{1}{6}}{\frac{1}{4}}=-\dfrac{1}{6}\cdot\dfrac{4}{1}=-\dfrac{2}{3}\neq-\dfrac{1}{4}

<h2>It's not a geometric sequence.</h2>

If a_3=-\dfrac{1}{16} then the common ratio is r=\dfrac{-\frac{1}{16}}{\frac{1}{4}}=-\dfrac{1}{16}\cdot\dfrac{4}{1}=-\dfrac{1}{4}

Put to the explicit formula:

a_n=-1\left(-\dfrac{1}{4}\right)^{n-1}

Put a_n=\dfrac{1}{1024} and solve for <em>n </em>:

-1\left(-\dfrac{1}{4}\right)^{n-1}=\dfrac{1}{1024}\qquad\text{use}\ a^n:a^m=a^{n-m}\\\\-\left(-\dfrac{1}{4}\right)^n:\left(-\dfrac{1}{4}\right)^1=\dfrac{1}{1024}\\\\-\left(-\dfrac{1}{4}\right)^n\cdot(-4)=\dfrac{1}{1024}\\\\(4)\left(-\dfrac{1}{4}\right)^n=\dfrac{1}{1024}\qquad\text{divide both sides by 4}\ \text{/multiply both sides by}\ \dfrac{1}{4}/\\\\\left(-\dfrac{1}{4}\right)^n=\dfrac{1}{4096}\\\\\dfrac{(-1)^n}{4^n}=\dfrac{1}{4^6}\qquad n\ \text{must be even number. Therefore}\ (-1)^n=1

\dfrac{1}{4^n}=\dfrac{1}{4^6}\iff n=6

5 0
3 years ago
This is urgent!!!!!!!!!!!!!!!!!!!!
Debora [2.8K]

Answer:

i am not completely sure but i believe the second or third one is the options, sorry i wish i could help more

Step-by-step explanation:

7 0
2 years ago
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Simplify 6m plus 2m minus 5
mr Goodwill [35]

Answer:

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Step-by-step explanation:

Lets write this out in an equation.The plus means addition and the minus means subtraction.  

6m+2m-5

Since there is two things with the same variable we can combine them.

8m-5

That is as simple as it gets.

6 0
3 years ago
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