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3 years ago

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of 101 randomly selected adults, 35 were found to have high blood pressure. construct a 95% confidence interval for the true per

centage of all adults that have high blood pressure

1 answer:

satela [25.4K]3 years ago

6 0

Answer:

33%

Step-by-step explanation:

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Sauron [17]

1) 56 pennies
2) 36 pennies
3) 14 dimes
4) 4 quarters
5) 5 nickels

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3 years ago

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Find the sum of the squares of the roots of 3x^2 + 4x + 12 = 0

Contact [7]

Answer:

-56/9

Step-by-step explanation:

Let p and q be the roots of the equation.

So, here's how we're gonna work it out:

${p}^{2} + {q}^{2} = \\ {p}^{2} + {q}^{2} +2 pq - 2pq = \\ ( {p}^{2} +2pq + {q}^{2}) - 2pq = \\ {(p + q)}^{2} - 2pq$

Vieta's formulas give us the sum and the product of the roots of a quadratic equation. Using them we obtain:

p + q = -b / a = - 4 / 3
p × q = c / a = 12 / 3 = 4

${(p + q)}^{2} - 2pq = \\ {( - \frac{ 4}{3} )}^{2} - 2 \times 4 = \frac{16}{9 } - 8 = \\ \frac{16 - 72}{9} = - \frac{56}{9}$

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3 years ago

Which formula can be used to describe the sequence below?<br>27,9,3,1,...

mr_godi [17]

Answer:

are there any pictures

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3 years ago

The ratio for 12 packs at 4 for $10

Lorico [155]

I think the ratio is for for every 4 packs it cost 10 dollars so in all it would cost 30 dollars

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3 years ago

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Which of the following is a quadratic equation that has the roots x = 2 and x = −7? (4 points)

crimeas [40]

Answer:

x^2 + 5x - 14

Step-by-step explanation:

We can assume that if there is 2 options for x, this is a quadratic equation that equals 0.

Therefore, we can put this into brackets as one bracket must equal 0.

(x - 2) (x + 7)

After this we expand, which is a process easier to search up

The answer is:

x^2 + 7x - 2x - 14

We can simplify this to:

x^2 + 5x - 14

x^2 represents x squared in case you were wondering

Therefore, the answer is:

x^2 + 5x - 14

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2 years ago