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3 years ago

12

Solve the system: (MAFS.912-A-REI.3.6)

1 answer:

faust18 [17]3 years ago

7 0

Step-by-step explanation:

$4x + 7y = 41 \\ 4 \times ( - 7) + 7 \times ( - 16) = 41$

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Solve the system by substitution.

Elina [12.6K]

D x= -9
Y=9
Because 4(-9)+45=9
I just put in each one and d got it right.

5 0

3 years ago

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the students on a decorating committee create a banner. The length of the banner is 2.5 times its width. The length of the banne

Lilit [14]

The width is 8 feet

20 divided by 2.5 equals 8 feet

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3 years ago

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Answer the question with explanation;

PSYCHO15rus [73]

Answer:

The statement in the question is wrong. The series actually diverges.

Step-by-step explanation:

We compute

$\lim_{n\to\infty}\frac{n^2}{(n+1)^2}=\lim_{n\to\infty}\left(\frac{n^2}{n^2+2n+1}\cdot\frac{1/n^2}{1/n^2}\right)=\lim_{n\to\infty}\frac1{1+2/n+1/n^2}=\frac1{1+0+0}=1\ne0$

Therefore, by the series divergence test, the series $\sum_{n=1}^\infty\frac{n^2}{(n+1)^2}$ diverges.

EDIT: To VectorFundament120, if $(x_n)_{n\in\mathbb N}$ is a sequence, both $\lim x_n$ and $\lim_{n\to\infty}x_n$ are common notation for its limit. The former is not wrong but I have switched to the latter if that helps.

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3 years ago

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What is the range for 25,25,21,28,37,26

lina2011 [118]

Answer:

16 is the range

Step-by-step explanation:

First, arrange the numbers from least to greatest.

21, 25, 25, 26, 28, 37

Then, subtract 21 (smallest number) from the 37 (biggest number).

37 - 21 = 16

So, the range is 16

Have a wonderful day!

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2 years ago

Suppose that the waiting time for an elevator at a local shopping mall is uniformly distributed from 0 to 90 seconds.

Nady [450]

Answer:

1/3

Step-by-step explanation:

60-90 is 30 numbers, right? So it is 30/90, or 1/3

7 0

3 years ago