3 years ago

Solve the quadratic expression by completing the square. 2p^2=6p-20

Mathematics

1 answer:

Leviafan [203]3 years ago

4 0

Answer:

p = 3/2 +- (i sqr root of 31)/2. I'm pretty sure that's right.

Step-by-step explanation:

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insurance company checks police records on 559 accidents selected at random and notes that teenagers were at the wheel in 91 of

ss7ja [257]

Answer: $(13.22\%,\ 19.34\%)$

Step-by-step explanation:

Given : Sample space : n= 559

Sample proportion : $\hat{p}=\dfrac{91}{559}=0.162790697674\approx0.1628$

$=16.28\%$

Significance level : $\alpha= 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Confidence level for population proportion:-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.1628\pm (1.96)\sqrt{\dfrac{0.1628(1-0.1628)}{559}}\\\\=0.1628\pm0.030604971367\\\\\approx 0.1628\pm0.0306=(0.1322,\ 0.1934)=(13.22\%,\ 19.34\%)$

Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.= $(13.22\%,\ 19.34\%)$

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4 years ago

How do you solve: 3In5+4Inx

Dafna11 [192]

Answer:

ln(125x $x^{4}$ )

Step-by-step explanation:

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3 years ago

Can someone help me on 20 pls

murzikaleks [220]

Answer:The answer is d.overturning the supreme courts decision in Dred Scott V. Sandford

Step-by-step explanation:

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3 years ago

Solve for p if 2|p| = 4

Rina8888 [55]

P is equal to plus or minus 2 because it'll both be equal to 4

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3 years ago

A person on a moving sidewalk travels 21 feet in 7 seconds.the moving sidewalk has a length of 180 feet how long wil it take to

Nastasia [14]

21 feet per 7 seconds = 21 ÷ 7 = 3 ft/s

180 ft ÷ 3ft/s = 60 seconds! (1 minute)

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3 years ago