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3 years ago

Find the exact solutions to x2 – 3x + 1 = 0 by using the Quadratic Formula.

Mathematics

1 answer:

miss Akunina [59]3 years ago

3 0

Answer:

Step-by-step explanation:

3 +- \/5 over 2

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Solve 3x+11= k for x.

Art [367]

None of the answers listed are correct.

3x + 11 = k

SUBTRACT 11 from both sides:

3x + 11 = k

-11 -11

You are then left with:

3x = k-11

DIVIDE 3 by both sides:

3x/3 = k-11/3

You are then left with:

x= k-11/3

4 0

3 years ago

Read 2 more answers

What is the y-coordinate of the midpoint of WU?<br> A 2.5<br> B. -1.5<br> C. -0.5<br> D. 1.5

lilavasa [31]

Option C: -0.5 is the right answer

Step-by-step explanation:

Given is the graph on which different points are indicated.

We have to find the y-coordinae of the mid-point of WU.

The formula for mid-point is:

$(\frac{x_1+x_2}{2} , \frac{y_1+y_2}{2})$

So we only have to know the y-coordinates of both points to find the mid-points y coordinate

So by observing the graph we get

y_1 =0

y_2 = -1

So,

$\frac{0-1}{2}\\= \frac{-1}{2}\\= -0.5$

Hence,

Option C: -0.5 is the right answer

Keywords: Mid-point, coordinate geometry

Learn more about coordinate geometry at:

#LearnwithBrainly

6 0

3 years ago

A regular polygon has an exterior angle of 7.5 what is the sum of the interior angle

AVprozaik [17]

Answer:

540

Step-by-step explanation:

8 0

3 years ago

I need help with this problem

dexar [7]

The answer to the equation is 15

5 0

3 years ago

A survey found that 89% of a random sample of 1024 American adults approved of cloning endangered animals. Find the margin of er

Kobotan [32]

Answer:

The margin of error for the survey is 0.016

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 1024

Sample proportion:

$\hat{p} = 89\% = 0.89$

We have to find the margin of error associated with a 90% Confidence interval.

Formula for margin of error:

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.10} = 1.64$

Putting the values, we get:

$M.E = 1.64\times (\sqrt{\dfrac{0.89(1-0.89)}{1024}})\\\\M.E=0.016$

Thus, the margin of error for the survey is 0.016

3 0

3 years ago