<img src="https://tex.z-dn.net/?f=2%20%20%7B%20%5Ctimes%20%7D%5E%7B2%7D%20%20-%204x%20-%202%20%3D%200" id="TexFormula1" title="2

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Sati [7]

2 years ago

{ \times }^{2} - 4x - 2 = 0" alt="2 { \times }^{2} - 4x - 2 = 0" align="absmiddle" class="latex-formula">

Mathematics

1 answer:

Leona [35]2 years ago

4 0

L think the answer is 2

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What is 66 2/3% of 39

lys-0071 [83]

Number x percent turned into decimal

39 x 0.666666666 = 26

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2 years ago

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Plz solve I’ve been stuck on how to start it and I just can’t

AleksAgata [21]

Answer:

x and y = 0

the question looks weird and almost wrong because when you subtract the equations, you are left with nothing

Step-by-step explanation:

Multiply the top equation by 3 to make the -x a -3x instead.

Then do the top equation - the bottom equation

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3 years ago

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Given a sample mean difference of 23, a standard error of 4.2, and a critical t value of 2.262, what are the values for the conf

erastova [34]

Answer: (13.4996, 32.5004)

Step-by-step explanation:

The confidence interval for mean difference is given by :-

$(\overline{x}_1-\overline{x}_2)\pm t^*\times SE$ ,

where $(\overline{x}_1-\overline{x}_2)$ = sample mean difference .

$t^*$ = critical t value (two-tailed)

SE= Standard error.

Given : $(\overline{x}_1-\overline{x}_2)=23$

$t^*=2.262$

SE= 4.2

Now, the confidence interval for mean difference will be :-

$23\pm (2.262)\times (4.2)\\\\= 23\pm9.5004\\\\=(23-9.5004,\ 23+9.5004)\\\\=(13.4996,\ 32.5004)$

Hence, the required confidence interval : (13.4996, 32.5004)

8 0

2 years ago

Does anyone know how to do this?

sineoko [7]

Answer:

$\boxed{\tt x=\sqrt{85} }$

Step-by-step explanation:

When making a right triangle with 2 points, the distance is the hypotenuse which can be represent as "x"

To find the distance we can use the Pythagorean theorem.

$\boxed{{\tt a^2+b^2=c^2}}$

→ $\tt a=9$

→ $\tt b=2$

→ $\tt c=x$

Let's Plug in the side lengths:

$\tt 9^2+2^2=x^2$

Evaluate 9²= 81 and 2²= 4:

$\tt 81+4=x^2$

Now, add 81+4= 85

$\tt 85=x^2$

Take the square root of both sides:

$\tt x=\sqrt{85}$

_____________________________

5 0

2 years ago

Please help math^^ o

kondaur [170]

Answer:

x-6

Step-by-step explanation:

7 0

2 years ago