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2 years ago

Which of the following situations most likely result in a negative correlation when the data is displayed on a scatterplot?

Mathematics

1 answer:

Lana71 [14]2 years ago

3 0

I am pretty sure that the answer is a because the rest of them show a positive correlation. And one of hem just scatters.
Hope this kinda helps.

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5. Find the discriminant of 15x2 = 4x – 1 and describe

diamong [38]

Answer:

a) The discriminant of the equation = - 44

b)The nature of the roots will be imaginary.

c) $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

Step-by-step explanation:

Here, the given expression is $15x^{2} = 4x -1$

or, $15x^{2} - 4x + 1 = 0$

Now the discriminant (D) of a quadratic equation $ax^{2} +b x + c = 0$

D = $b^{2} - 4ac = (-4)^{2} - 4(15) (1) = 16 - (60) = -44$

Hence, the discriminant of the equation = - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : $x = \frac{-b \pm \sqrt{b^{2} - 4ac} }{2a}$

So, here $x = \frac{-(-4) \pm \sqrt{D} }{2a} = \frac{4 \pm \sqrt{(-44 )} }{30}$

So, either $x = \frac{4 + \sqrt{(-44 )} }{30} or, x = \frac{4 - \sqrt{(-44 )} }{30}$

or, $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

8 0

2 years ago

I’m doing operations and interfers<br> Need the answer have a test tmr

arsen [322]

Answer:

all work for both worksheets are pictured and shown

Step-by-step explanation:

worksheet 2

28. 968/22=44

29. 27+8=35

30. 39×37=-1443

5 0

2 years ago

Solve 3(2n-7) + 12 =39

natka813 [3]

Your answr is n=8. if this helped plz mark brainliest

6 0

3 years ago

Find the mean, variance, and standard deviation. If necessary, round your answer to the nearest hundredth.

lora16 [44]

Answer:

Mean = 24

Variance = 107.78

Standard deviation = 10.38

Hope this helps! :)

4 0

2 years ago

Whats the distance given between (-4,1) and (2,0)

inn [45]

Answer:

√37

Step-by-step explanation:

3 0

2 years ago