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1 year ago

What's 5x5+6x3-1 Me brain is no working, please help

Mathematics

1 answer:

-BARSIC- [3]1 year ago

6 0

Answer:

Step-by-step explanation:

5*5+6*3-1

25+6*3-1

25+18-1

43-1

=42

I hope this helped, please give me Brainliest if it did. :)

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Answer:

1. 309.375

2. 275.625

3. 150

Step-by-step explanation:

L*W*H=V

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2 years ago

Eight two-person teams are participating in a three-legged race. Find the number of orders in which all 8 teams can finish the r

PilotLPTM [1.2K]

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2 years ago

What is the answer i really need help (−3)3 + (5 − 2)4

Katarina [22]

The answer to your question is 3
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2 years ago

A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%

andre [41]

Answer: a) 683 b) 1067

Step-by-step explanation:

The confidence interval for population proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

a) Given : Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}}=\pm1.96$

Margin of error : $E=0.03$

Formula to calculate the sample size needed for interval estimate of population proportion :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.2(0.8)(\dfrac{1.96}{0.03})^2=682.951111111\approx683$

Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.03})^2=1067.11111111\approx1067$

Hence, the required sample size would be 1067 .

3 0

2 years ago

A triangle is show below, what is the value of X?

lidiya [134]

Answer:

x=149

Step-by-step explanation:

pythagoras theorem dictates that a squared +b squared= c squared

in this case, c=x

51*51+140*140=x*x

2601+19600=x*x

22201=x*x

x=149

6 0

2 years ago