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pogonyaev
3 years ago
14

Is y + 5x^2=-4 a quadratic function? yes or no​

Mathematics
2 answers:
devlian [24]3 years ago
7 0

Answer:

Yes

Step-by-step explanation:

In standard form, this function is written as:

y =  - 5 {x}^{2}  - 4

Because it has the parent function of:

y =  {x}^{2}

It is a quadratic function.

Arlecino [84]3 years ago
5 0

Answer: Yes

Step-by-step explanation:

When you rearrange the equation it would be y=-5x^2-4, and since it is a 2nd degree we can easily say it is a quadratic function.

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A cheese processing company wants to estimate the mean cholesterol content of all one-ounce servings of a type of cheese. The es
Mrrafil [7]

Answer:

The minimum sample size required to construct a 95% confidence interval for the population mean is 65.

Step-by-step explanation:

We are given the following in the question:

Population standard deviation,

\sigma = 3.10\text{ milligrams}

We need to construct a 95% confidence interval such that the estimate is within 0.75 milligrams of the population mean.

Thus, the margin of error must me 0.75

Formula for margin of error:

z_{critical}\times \dfrac{\sigma}{\sqrt{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

0.75 = 1.86\times \dfrac{3.10}{\sqrt{n}}\\\\\sqrt{n} = \dfrac{1.96\times 3.10}{0.75}\\\\\sqrt{n} = 8.101\\\Rightarrow n = 65.63\approx 65

Thus, the minimum sample size required to construct a 95% confidence interval for the population mean is 65.

5 0
3 years ago
What is the function rule​
muminat

Answer:

A function rule describes how to convert an input value (x) into an output value (y) for a given function. An example of a function rule is f(x) = x^2 + 3.

Step-by-step explanation:

3 0
3 years ago
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What property of a rhombus is used in this proof of showing that a triangle is an equilateral triangle?
iragen [17]

Answer:

Step-by-step explanation:

4 0
2 years ago
Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?
pickupchik [31]
Substituting the value of X in each of the equations.The best answer would be the equation satisfying both of the sides.
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What is 3/4 ÷ 1/6? Please help !......
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Answer:

4 1/2

Step-by-step explanation:

Apply the fractions formula for division, to

3/4÷1/6

and solve

3/6x4/1

=18/4

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18/24÷2/2=9/2

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Therefore:

3/4÷1/6=4 1/2

4 0
3 years ago
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