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2 years ago

11

Please help If using the method of completing the square to solve the quadratic equation

1 answer:

Luba_88 [7]2 years ago

4 0

I don’t know I suck at math sadly

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How to solve rational equations

VashaNatasha [74]

Answer:

A rational number is a number that can be represented a/b where a and b are integers and b is not equal to 0.

Find the common denominator.

Multiply everything by the common denominator.

Simplify.

Check the answer(s) to make sure there isn't an extraneous solution.

4 0

3 years ago

I have no idea what this is-

Studentka2010 [4]

Answer:

the question is asking you to find the area i.e length of the angle and for that you have to find out the length of the xy and kz by making equations.

you can do Xy=Kz as they are parallel lines and i think the answer will be 5m and after finding the length do the following process

6 0

2 years ago

Read 2 more answers

Of the population of all fruit flies we wish to give a 90% confidence interval for the fraction which possess a gene which gives

maks197457 [2]

Answer:

The margin of error for the 90% confidence interval is of 0.038.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene.

This means that $n = 400, \pi = \frac{280}{400} = 0.7$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

Give the margin of error for the 90% confidence interval.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.645\sqrt{\frac{0.7*0.3}{400}}$

$M = 0.038$

The margin of error for the 90% confidence interval is of 0.038.

8 0

2 years ago

If tan x =1/2<br> find sin x<br> 2

irina1246 [14]

Answer:

t

=

26

∘

57

+

k

360

∘

Step-by-step explanation:

tan

t

=

1

2

Calculator and unit circle give 2 solutions for (0, 360) -->

t

=

26

∘

57

, and

t

=

180

+

26.57

=

206

∘

57

General answer:

t

=

26

∘

57

+

k

360

∘

6 0

3 years ago

NEEEEDD HEEELLLPPPP

rusak2 [61]

Option 2: $\frac{x-12}{4}$ is the correct answer

Step-by-step explanation:

Given fraction is:

$\frac{2x-24}{8}$

In order to simplify, we can see that the function is already in compact form

So,

We can simplify the given fraction.

We can see that the numerator can be further simplified

$\frac{2(x-12)}{8}\\=\frac{x-12}{4}$

Hence,

Option 2: $\frac{x-12}{4}$ is the correct answer

Keywords: Polynomials, expressions

Learn more about polynomials at:

#LearnwithBrainly

8 0

3 years ago