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3 years ago

15

How to factor X^2+2x+6

2 answers:

Trava [24]3 years ago

7 0

Its (x+1−√<span><span><span><span>5</span><span></span></span>ı)(x+1+<span>√<span><span>5</span><span></span></span></span>ı)</span><span>
</span></span>

Maru [420]3 years ago

3 0

The way you can factor it is X (to the power of 2) + 2x+6

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if you can buy for over 5 of a pound of ham for $3 how much can you purchase for $10 write your answer as a fraction of a pound

NNADVOKAT [17]

You answer would be 50/3 or 16 2/3. If you have learned about cross-multiplying, you would set it up as 5/3=x/10; then 5*10=3*x; You would get x alone, getting your answer. If you have NOT learned cross-multiplication, you divide 10 by 3, getting 3 1/3 or 10/3; then multiply by 5, getting your answer. I hope this helps!!!

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4 years ago

Slopes of parallel lines are

KatRina [158]

Answer:

the same as the original equation

Step-by-step explanation:

Since they don't intersect the slope is the same

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4 years ago

It is suspected that calcium in blood platelets may be related to blood pressure. As part of a study of this relationship, resea

mr Goodwill [35]

Answer:

Step-by-step explanation:

The null and the alternative hypothesis are:

$\mathbf{ H_o: \rho = 0} \\ \\ \mathbf{H_1: \rho \ne 0}$

The test statistics is as follows:

$t = \dfrac{r\sqrt{n-2} }{\sqrt{1-r^2}}$

$t = \dfrac{0.4 \sqrt{30-2} }{\sqrt{1-0.4^2}}$

$t = \dfrac{0.4 \sqrt{28} }{\sqrt{0.84}}$

t = 2.3094

The critical value

$t_{\alpha/df} = t_\ \{0.05/2 \ , \ 30-2 \} } \\ \\ = t_{0.025,28} = \pm 2.048 ( from \ the \ t-tables)$

Decision rule:

To reject $H_o$ if t > $t_{\alpha/df}$ .

So since t > $t_{\alpha/df}$ . we reject $H_o$ at ∝ = 0.05

Conclusion: There is sufficient evidence to conclude that blood pressure and patient calcium are linearly related.

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3 years ago

Assume the readings on thermometers are normally distributed with a mean of 0degreesC and a standard deviation of 1.00degreesC.

Nat2105 [25]

Answer:

$P(-2.05$

And we can find this probability with this difference

$P(-2.05$

And we can see the figure in the plot attached.

Step-by-step explanation:

Let X the random variable that represent the redings on thermometers of a population, and for this case we know the distribution for X is given by:

$X \sim N(0,1)$

Where $\mu=0$ and $\sigma=1$

We are interested on this probability

$P(-2.05$

We can use the z score formula given by:

$z=\frac{x-\mu}{\sigma}$

Using this formula we got:

$P(-2.05$

And we can find this probability with this difference

$P(-2.05$

And we can see the figure in the plot attached.

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4 years ago

Slope -2, passes through (-4, 6)

masya89 [10]

Answer:

y = -2x-2

Step-by-step explanation:

y=mx+b

m is the slope, which you already wrote (-2)

b is the initial condition, the value of y when x equals 0.

For (-4,6), we need a value 0 for x, so we add 4, but for each x value added, we add -2 to the y value, so 4 times, 6 - 8 = -2

Hope that helps

6 0

3 years ago