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3 years ago

Find the explicit formula for arithmetic sequences. 38, 238, 438, 638, ..

Mathematics

1 answer:

Eddi Din [679]3 years ago

7 0

Answer:

200n - 162.

Step-by-step explanation:

first trem a1 = 38

common difference d = 200

nth term = a1 + (n-1(d

= 38 + 200(n-1)

= 200n - 162

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Rotation 90 clokwise HELP PLEASE

Ad libitum [116K]

Answer:

Step-by-step explanation:

I assume you want to rotate each point about the origin.

To rotate a point (x, y) 90° clockwise about the origin:

(x, y) → (y, -x)

For point A:

(-5, 0) → (0, 5)

For point B:

(-5, 3) → (3, 5)

For point C:

(0, 4) → (4, 0)

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3 years ago

Evaluate the line integral in Stokes' Theorem to evaluate the surface integral ModifyingBelow Integral from nothing to nothing

Helga [31]

Answer:

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Step-by-step explanation:

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3 years ago

Shape 1 and shape 2 are plotted on a coordinate plane. Which statement about the shapes is true?

Marianna [84]

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</span>

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4 years ago

Read 2 more answers

The standard deviation of test scores on a certain achievement test is 11.3. If a randomsample of 81 students had a sample mean

Svetradugi [14.3K]

Answer: (72.535, 76.665)

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where $\sigma$ = population standard deviation.

n= Sample size

$\overline{x}$ = sample mean.

$z^*$ = Critical z-value (two-tailed)

Given : $\sigma=11.3$

n= 81

$\overline{x}=74.6$

The critical values for 90% confidence interval : $z^*=\pm1.645$

Now, the confidence interval for population mean would be :

$74.6\pm (1.645)\dfrac{11.3}{\sqrt{81}}\\\\=74.6\pm(1.645)(\dfrac{11.3}{9})\approx74.6\pm2.065\\\\=(74.6-2.065,\ 74.6+2.065)\\\\=(72.535,\ 76.665)$

Hence, a 90 percent confidence interval estimatefor the average score of all students. : (72.535, 76.665)

8 0

3 years ago

The equation of line k is y=−1/5x−1/8. What is the equation of the line that is perpendicular to line k and passes through (0, 0

Kruka [31]

For this i will not give the answer but i will guide you one how to do it

first of all if the line is perependicular to -1/5x-1/8 that mean its the opposite and swicht signs. so since jt only effects the slope the slpoe for the other equation will be from -1/5 to 5 since we flipped the fraction and flipped the sign. next it also says that the new line k has to pass through (0,0) that would mean since (x,y) equals (0,0) we would have to plug the x and y which is the two zeros giving us and equation like this
0=5(0)+b
if we make in it slope intercept form it would have to be y=mx+b
then if you slove for b you will put it into the equation
y=5x+b
text/chat me if you dont understand or you need the answer.
hope this helps

5 0

3 years ago