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3 years ago

2x^2-19x+9=0 quadratic formula or zero product property. Which ever is easier?

Mathematics

1 answer:

slavikrds [6]3 years ago

8 0

Answer:

Step-by-step explanation:

x=9

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Find the product or quotient of 60÷12=?

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Your answers is for sure 5

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3 years ago

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Which graph shows the system of equations 4x+y = 3 and 2x-3y = 3?<br>

jarptica [38.1K]

Answer:

red line is 4x+y=3 and blue line is 2x-3y=3

Step-by-step explanation:

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2 years ago

Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a

Vikki [24]

Answer:

$0.81 - 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.730$

$0.81 + 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.890$

And the confidence interval would be:

$0.730 \leq \p \leq 0.890$

Step-by-step explanation:

Information given:

$n=131$ represent the sample size

$\hat p=0.81$ represent the estimated proportion

The confidence interval would be given by this formula

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

For the 98% confidence interval the value of $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=2.326$

And replacing into the confidence interval formula we got:

$0.81 - 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.730$

$0.81 + 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.890$

And the confidence interval would be:

$0.730 \leq \p \leq 0.890$

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3 years ago

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koban [17]

Answer:

Step-by-step explanation:

Just see the length of the R line, A and B are almost the same large when you add them.

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3 years ago

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What is 8.1% of 252?<br>

VMariaS [17]

Answer:

20.412

Step by step explanation:

8.1% of 252 = 0.081 × 252 = 20.412

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3 years ago