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1 year ago

Aline'sslopeis3,andits

Mathematics

1 answer:

hammer [34]1 year ago

7 0

Answer:

y=3x+4

Step-by-step explanation:

The formula for point slope form is

y=mx+b

m is the slope and b is the y intercept, therefore we get the answer:

y=3x+4

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Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed

lana66690 [7]

Answer: $(95.2,\ 100.8)$

Step-by-step explanation:

Given : Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 4 psi.

A random sample of 8 specimens is tested, and the average breaking strength is found to be 98 psi.

i.e. n= 8 and $\overline{x}=98$

Critical value for 95% confidence = $z_{\alpha/2}=1.96$

Confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

i.e. $98\pm (1.96)\dfrac{4}{\sqrt{8}}$

$\approx98\pm 2.7719$

$=(98-2.7719,\ 98+2.7719)$

$=(95.2281,\ 100.7719)\approx(95.2,\ 100.8)$

Hence, a 95% two-sided confidence interval on the true mean breaking strength. = $(95.2,\ 100.8)$

5 0

3 years ago

A dodecahedral die (one with 12 sides numbered from 1 to 12) is tossed once. Find the probability that the number on the upward

zalisa [80]

Answer:

the probability is $\frac{1}{3}$

Step-by-step explanation:

there are 4 numbers on a 12 sided die that can be divided by 3: 3, 6, 9, and 12.

so the probability would be $\frac{4}{12}$ , or $\frac{1}{3}$

5 0

3 years ago

Which sample fairly represents the population? Check all that apply. measuring the heights of every fiftieth person on the schoo

Minchanka [31]

<span>measuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school

wrong as should be boys only

</span><span>calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment

is the ans</span>

5 0

4 years ago

Read 2 more answers

K help plz and thank you

Rzqust [24]

Answer:

9m-45

Step-by-step explanation:

1) multiply 9*m, which is 9m

2) multiply 9*-5, which is -45

4 0

3 years ago