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satela [25.4K]
3 years ago
9

The graph of y = ax 2 + bx + c is shown below. Determine the solution set of 0 = ax 2 + bx + c.

Mathematics
2 answers:
AleksandrR [38]3 years ago
5 0

Answer:

the solution set of the quadratic equation is {0,4}

Step-by-step explanation :

we know that

The zero's of a quadratic function are the values of x when the value of the function is equal to zero

so

In this problem observing the graph

The zero's of the function are the points (0,0) and (4,0)

therefore

the solution set of the quadratic equation is {0,4}

Pavlova-9 [17]3 years ago
4 0
On the graph, it's shown that the function has two real roots. This means that there will be two solutions. So the answer is 1. {0,4}
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Step-by-step explanation:

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One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio
Bess [88]

Answer:

n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62  

So the answer for this case would be n=62 rounded up to the nearest integer  

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

\bar X represent the sample mean for the sample  

\mu population mean

\sigma=60 represent the population standard deviation  

n represent the sample size (variable of interest)  

Confidence =95% or 0.95

The margin of error is given by this formula:  

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}} (1)  

And on this case we have that ME =15, and we are interested in order to find the value of n, if we solve n from equation (1) we got:  

n=(\frac{z_{\alpha/2} \sigma}{ME})^2 (2)  

The critical value for 95% of confidence interval is provided, z_{\alpha/2}=1.96, replacing into formula (2) we got:  

n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62  

So the answer for this case would be n=62 rounded up to the nearest integer  

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12r2s + 21rs2 – 3rs=
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Answer:
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explanation:
collect like terms
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A bag contains 15 coins consisting of quarters and dimes. The total value of the coins is $2.55. Which system of equations can b
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Answer: d+q= 2.55

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I believe this is how you do it

Step-by-step explanation:

5 0
3 years ago
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