3 years ago

Write two expressions where the solution is 28

Mathematics

1 answer:

GuDViN [60]3 years ago

4 0

4×7 and 14×2

I know there's more but that's what came into my head.

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What is 4 divided by 520

Mademuasel [1]

The answer is 130!!!!!

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3 years ago

The sum of 30 times (1/3)^(n-1) from 1 to infinity

sergeinik [125]

Let

$S_n=\displaystyle1+\frac13+\frac1{3^2}+\cdots+\frac1{3^n}$

Then

$\dfrac13S_n=\displaystyle\frac13+\frac1{3^2}+\frac1{3^3}+\cdots+\frac1{3^{n+1}}$

and

$S_n-\dfrac13S_n=\dfrac23S_n=1-\dfrac1{3^{n+1}}\implies S_n=\dfrac32-\dfrac1{2\cdot3^n}$

and as $n\to\infty$ , we end up with

$\displaystyle\lim_{n\to\infty}S_n=\lim_{n\to\infty}\sum_{i=1}^{n+1}\frac1{3^{i-1}}=\lim_{n\to\infty}\left(\frac32-\frac1{2\cdot3^n}\right)=\frac32$

So we have

$\displaystyle\sum_{n=1}^\infty30\left(\frac13\right)^{n-1}=30\cdot\frac32=45$

8 0

3 years ago

Nedddddddddd helpppppppppppppp

Law Incorporation [45]

Answer:

m= -3

Step-by-step explanation:

using slope formula (Y2-Y1)/(X2-X1)

(9-3)/(8-10)

6/-2

m= -3

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3 years ago

What are all the equivalent fractions to 1 fourth

lara [203]

2/8, 3/12, 4/16, 5/20, 6/24, 7/28, 8/32, 9/36, 10/40, 11/44, 12/48, etc.

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3 years ago

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The map shows the location of four places in a school.

Whitepunk [10]

Answer:

the answer would be (-2,5)

Hope it helps!

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3 years ago

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