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2 years ago

What is the greatest common factor (GCF) of 81 and 18? A. 3 B. 81 C. 9 D. 162

Mathematics

2 answers:

SCORPION-xisa [38]2 years ago

8 0

Answer:

C. 9

Step-by-step explanation:

81 = 9 x 9

18 = 9 x 2

so the greatest common factor (GCF) of 81 and 18 : 9

Answer is C. 9

denis23 [38]2 years ago

5 0

the answer is C. 9 bc 9 goes into 81 and 18

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2 years ago

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals

Alekssandra [29.7K]

Answer:

(0.767,0.833)

Step-by-step explanation:

The 95% confidence interval for population proportion p can be computed as

$p-z_{\frac{\alpha }{2} } \sqrt{\frac{pq}{n} }$

The z-value associated with 95% confidence level is 1.96.

whereas p=x/n

We are given that x=440 and n=550.

p=440/550=0.8

$0.8-1.96\sqrt{\frac{0.8(0.2)}{550} }$

$0.8-1.96\sqrt{\frac{0.16}{550} }$

$0.8-1.96\sqrt{0.00029 }$

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0.767<P<0.833 (rounded to 3 decimal places)

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2 years ago

4-2x=11 how do I solve

Bingel [31]

Hey there!☺

$Answer:\boxed{x=\frac{-7}{2}}$

$Explanation:$

$4-2x=11$

In our first step, we will simplify both sides of the equation:

$4+-2x=11\\-2x+4=11$

Now subtract 4 from both sides:

$-2x+4-4=11-4\\-2x=7$

In our last step, we will divide both sides by -2:

$\frac{-2x}{2}=\frac{7}{-2}\\ x=\frac{-7}{2}$

x=-7/2 is your answer.

Hope this helps!☺

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2 years ago

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