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3 years ago

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1 answer:

7 0

I'm unsure what the middle term is, but a x^2 equation always has 2 solutions. Although sometimes they are not both real numbers.

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PLS ANSWER

avanturin [10]

The set of points that represents a function is given by:

A {(2, 1), (7, 9), (3, 12), (4, 10)}.

<h3>When does a relation represents a function?</h3>

A set, or a relation, represents a function when <u>each value of x is mapped to only one value of y</u>.

In this problem, we have that option A represents a function, as:

In option B, x = 2 and x = -2 are mapped to two values.

In option C, x = 4 is mapped to four values.

In option D, both x = 1 and x = 2 are mapped to two values.

Hence the set of points that represents a function is given by:

A {(2, 1), (7, 9), (3, 12), (4, 10)}.

More can be learned about relations and functions at brainly.com/question/12463448

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8 0

2 years ago

A school authority claims that the average height of students is 178 cm. A researcher has taken a well-designed survey and his s

Hunter-Best [27]

Answer:

d) The difference exists due to chance since the test statistic is small

Step-by-step explanation:

From the given information:

Population mean = 178 cm

the sample mean = 177.5 cm

the standard deviation = 2

the sample size = 25

The null hypothesis and the alternative hypothesis can be computed as:

Null hypothesis:

$H_o: \mu = 178$

Alternative hypothesis:

$H_1: \mu \neq 178$

The t-test statistics is determined by using the formula:

$t = \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$t = \dfrac{177.5 - 178}{\dfrac{2}{\sqrt{25}}}$

$t = \dfrac{-0.5}{\dfrac{2}{5}}}$

$\mathbf{t= -1.25}$

Degree of freedom df = n- 1

Degree of freedom df = 25 - 1

Degree of freedom df = 24

At the level of significance ∝ = 0.05, the critical value = 2.064

Decision rule: To reject the null hypothesis if the test statistics is greater than the critical value at 0.05 level of significance

Conclusion: We fail to reject the null hypothesis since the test statistics is lesser than the critical value and we conclude that the difference exists due to chance since the test statistic is small

5 0

3 years ago

Question

34kurt

Answer:

no I have no idea I justwant points

5 0

3 years ago

Read 2 more answers

A road crew much repave a road that is 4/5 miles long. They can repave 1/20 miles each hour. How long will it take the crew to r

lutik1710 [3]

Answer:

16 hours

Step-by-step explanation:

Multiply the 4/5 by 4 to get the denominator as 20. So you do 4 x 4 which equals 16 and 5 x 4 which equals 20 so you get 16/20 miles or 16 hours.

3 0

3 years ago

PLEASE HELP ! (EASY)<br><br> (x-7)^3 (x+2)^2 (x-13) <0<br><br> what are the possible values of x?

Dimas [21]

Just plug the inequality in desmos and you get 7<x<13

4 0

3 years ago