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2 years ago

What is the value of A when we rewrite (1/7)^x-2 - (1/7) ^x as A x (1/7)^x

Mathematics

2 answers:

wlad13 [49]2 years ago

8 0

Answer:

Step-by-step explanation:

Khan Academy

vitfil [10]2 years ago

3 0

Answer:

i think its 330

Step-by-step explanation:

idfk tbh ijnp

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The proportion of left handed people in the population is about 0.10. Suppose a random sample of 300 people is observed. (a) Wha

pantera1 [17]

Answer: $(\hat{p})\sim N(0.10,\ 0.017)$

Step-by-step explanation:

Sampling distribution of the sample proportion $(\hat{p})$ :

$(\hat{p})\sim N(p,\ \sqrt{\dfrac{p(1-p)}{n}})$

The sampling distribution of the sample proportion $(\hat{p})$ has mean = $\mu_{\hat{p}}=p$ and standard deviation = $\sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}$ .

Given : The proportion of left handed people in the population is about 0.10.

i.e. p=0.10

sample size : n= 300

Then , the sampling distribution of the sample proportion $(\hat{p})$ will be :-

$(\hat{p})\sim N(0.10,\ \sqrt{\dfrac{0.10(1-0.10)}{300}})$

$(\hat{p})\sim N(0.10,\ \sqrt{0.0003})$

$(\hat{p})\sim N(0.10,\ 0.017)$ (approx)

Hence, the sampling distribution of the sample proportion $(\hat{p})$ is $(\hat{p})\sim N(0.10,\ 0.017)$

8 0

2 years ago

nekit [7.7K]

Answer:

$XY = 18$

Step-by-step explanation:

Given

$ABC:AXY = 4 : 3$

$BC = 24$

Required

Find XY

Represent BC and XY as a ratio;

$BC : XY = 24 : xy$

Recall that:

$ABC:AXY = 4 : 3$

Equate both ratios;

$24 : xy = 4 : 3$

Convert to fractions

$\frac{24}{xy} = \frac{4}{3}$

Cross Multiply

$xy * 4 = 24 * 3$

$xy * 4 = 72$

Divide through by 3

$xy * 4/4 = 72/4$

$xy = 18$

Hence:

$XY = 18$

3 0

2 years ago

What is the equation of the blue graph?

vovikov84 [41]

Answer:

Step-by-step explanation:

I just did it in my math class and got it right

7 0

2 years ago

Solve the right triangle.<br> Round your answers to the nearest tenth.<br><br> Help!

maks197457 [2]

answer: 1/2 bh

Step-by-step explanation

3 0

2 years ago

Given Ray BA bisects ∠CBD and the diagram below, what is m∠ABD?

Illusion [34]

The measure of the angle ∠ABD is 64 degrees

<h3>How to determine the measure of the angle?</h3>

From the question, we have the following parameters:

Ray BA bisects ∠CBD

∠CBD = 5x + 18

∠ABC = 3x - 2

Because of the bisection, we have

∠ABC = ∠ABD

∠ABC * 2 = ∠CBD

Substitute the known values in the above equation, so, we have the following representation

(3x - 2) * 2 = 5x + 18

Open the brackets

6x - 4 = 5x + 18

Evaluate the like terms

x = 2

Recall that

∠ABC = ∠ABD

So, we have

∠ABD = 3x - 2

This gives

∠ABD = 3 x 22 - 2

Evaluate

∠ABD = 64

Hence, the angle is 64 degrees