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3 years ago

What are the zeros of the quadratic function graphed below?

Mathematics

2 answers:

Alchen [17]3 years ago

8 0

Answer: The correct option is

(A) {-1, -5}.

Step-by-step explanation: We are given to find the zeroes of the quadratic function graphed in the figure shown.

We know that

the zeroes of a quadratic function f(x) are the value of x for which f(x) is equal to zero.

That is, the points on the graph where the curve crosses the X-axis.

From the graph, we note that the curve of the function crosses the X-axis at the points x = 1 and x = -5.

Therefore, the zeroes of the given function are x = -1 an x = -5.

Thus, option (A) is CORRECT.

poizon [28]3 years ago

4 0

A -1,-5 because that is where it crosses the x axis

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The null and alternative hypotheses for a population proportion, as well as the sample results, are given. Use StatKey or other

zloy xaker [14]

Answer:

$z=\frac{0.38 -0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}=-2.4$

$p_v =P(z$

And we can use the following excel code to find it:

"=NORM.DIST(-2.4,0,1,TRUE)"

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

$\hat p=0.38$ estimated proportion of interesst

$p_o=0.5$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the proportion is lower than 0.5:

Null hypothesis: $p \geq 0.5$

Alternative hypothesis: $p < 0.5$

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.38 -0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}=-2.4$

Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The next step would be calculate the p value for this test.

Since is a left tailed test the p value would be:

$p_v =P(z$

And we can use the following excel code to find it:

"=NORM.DIST(-2.4,0,1,TRUE)"

4 0

3 years ago

Please help!! Brainliest!!

meriva

Answer:

It's C.

Step-by-step explanation:

x + y + x + y + 3(y + 5)

= x + y + x + y + 3y + 15

= 2x + 5y + 15.

7 0

4 years ago

Which of the following modifications to the list of assets and liabilities below would result in a positive net worth? Home owne

ratelena [41]

His home is worth 105,000. That increases his net worth (but the mortgage negates most of that).
His car is worth 26000 but the loan is worth 22000 which negates most of the value of the car.
Investment fund and savings increase his net worth, but the credit card eats up another 16000. Yes he can pay the credit card off monthly, but he should never have run it up as much as he has.

In actual fact, he has little of his own that could be called net worth.
The house is net 5000
The car is net 4000
The two small funds give 6000
So far the assets number 15000
But the credit card is a debt that wipes out everything else. His best course of action is pay off the card as quickly as possible. The interest is going to eat him alive.

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4 years ago

Write a decimal where the value of a digit is 1/10 as much as a digit in another place.

dolphi86 [110]

10.1, 20.1 , 30.1 are the decimal where the value of digit 1/10 had existed.

“Decimal” comes from the Latin root decem, which simply means “ten.” The number system we use is called the decimal number system, because the place value units go in tens: you have ones, tens, hundreds, thousands, and so on, each unit being 10 times the previous one.

In common language, the word “decimal number” has come to mean numbers which have digits after the decimal point, such as 5.8 or 9.302. But any number within the decimal number system could be designate a decimal number, involve whole numbers such as 12 or 381.

A Decimal Number (based on the number 10) contains a Decimal Point.

Here is the number "forty-five and six-tenths" written as a decimal number:

The decimal point goes between Ones and Tenths.

45.6 has 4 Tens, 5 Ones and 6 Tenths, like this:40+5+6/10

6 0

3 years ago

What is 3×584 in expanded form

Ahat [919]

Three mulitplied by five-hundred eighty four

4 0

4 years ago

Read 2 more answers