2 years ago

Help me to solve all of this questions

Mathematics

1 answer:

Lemur [1.5K]2 years ago

3 0

Answer:

x - 36

Step-by-step explanation:

2x - x + 4(x - (x + 7) - 2)

opening the bracket

x + 4(x - x - 7 - 2)

x + 4(-7-2)

x + 4(-9)

x+(-36)

x-36

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Marina86 [1]

Answer:

y=5

Step-by-step explanation:

4(y-6)=-4

4y-24=-4

+24 +24

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Eddy's yard is 12 feet wide and 20 feet long. It is covered with grass.

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Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing deci

zimovet [89]

Answer: 271

Step-by-step explanation:

As per given description in the question, we have

Critical value for 90% confidence interval = $z_{\alpha/2}=1.645$

[using z-value calculator ]

Margin of error : E= 0.05

Since prior estimate of population proportion is unknown so we take p= 0.5

Formula we use to find the sample size :

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$ [we assume p= 0.50]

i.e. $n=0.5(1-0.5)(\dfrac{1.645}{0.05})^2$

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