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3 years ago

May you please help

Mathematics

1 answer:

PSYCHO15rus [73]3 years ago

3 0

Answer:

its 5x-4=12

Step-by-step explanation:

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A certain change in a process for manufacture of component parts is being considered. Samples are taken using both the existing

Katyanochek1 [597]

Answer:

a) The confidence interval is $0.00\leq\pi_1-\pi_2\leq0.02$ .

Step-by-step explanation:

We have to calculate a confidence interval (CI) of a difference of proportions.

For the existing procedure, the proportion is:

$p_1=75/1500=0.05$

For the new procedure, the proportion is:

$p_2=80/2000=0.04$

To calculate the CI, we need to estimate the standard deviation

$s=\sqrt{\frac{p_1(1-p_1)}{n_1} +\frac{p_2(1-p_2)}{n_2} }\\\\s=\sqrt{\frac{0.05(1-0.05)}{1500} +\frac{0.04(1-0.04)}{2000} }=\sqrt{ 0.000032 + 0.000019 }=\sqrt{ 0.000051 }\\\\s=0.007$

For a 90% CI, the z-value is 1.64.

Then, the CI is:

$(p_1-p_2)-z*\sigma \leq\pi_1-\pi_2\leq(p_1-p_2)+z*\sigma \\\\(0.05-0.04)-1.64*0.007\leq\pi_1-\pi_2\leq(0.05-0.04)+1.64*0.007\\\\0.01-0.01\leq\pi_1-\pi_2\leq0.01+0.01\\\\0.00\leq\pi_1-\pi_2\leq0.02$

6 0

3 years ago

What are the x and y intercepts of the equation 2x-y=4

Len [333]

Answer:

x-intercept:(2,0)

y-intercept:(0,-4)

Step-by-step explanation:

3 0

3 years ago

Solve<br><br> 4(3x - 2) = 52

guapka [62]

Answer:

x= 5

Step-by-step explanation:

first we open brackets

12x-8=52

then transpose

12x= 52+8

12x= 60

x= 60/12

x= 5

hope it helps , pls mark me as brainliest

5 0

4 years ago

Factor. w(squared)+18w+81

solong [7]

${w}^{2} + 18w + 81 \\ (w + 9)(w + 9) \\ or \\ {(w + 9)}^{2}$

7 0

3 years ago

Margaret has $200 in her savings account. She will save $50 more dollars each week and not take any money out of the account. Wh

Ad libitum [116K]

Option one because it’s going up by 50 and it’s also showing that she’s starting with the 200$ she already had

4 0

3 years ago

May you please help ​

May you please help