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2 years ago

-19 and 19 are called

Mathematics

1 answer:

Marina CMI [18]2 years ago

5 0

Answer:

Hey Friend.....

Step-by-step explanation:

This is your answer....

<h2>Additive inverse</h2>

Hope it helps!

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<img src="https://tex.z-dn.net/?f=%20-%207%20%2B%20%20%5Cfrac%7Bf%7D%7B2%7D%20%3D%20%20-%201" id="TexFormula1" title=" - 7 + \f

vovikov84 [41]

First you had to add by seven from both sides of equation form.

$-7+\frac{f}{2}+7=-1+7$

Then simplify by equation.

$\frac{f}{2}=6$

Next, you multiply by two from both sides of equation form.

$\frac{2f}{2}=6*2$

And finally, simplify by equation.

$6*2=12$

$2*6=12$

$12/6=2$

$12/2=6$

$f=12$

Final answer: $\boxed{f=12}$

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

-Charlie

3 0

3 years ago

HELP! The Last option is none of the above

IgorC [24]

The relationship between <a and <B is supplementary angles.

both <a and <B are in a straight line..so they are supplementary angles 

Supplementary angles are equal to 180 degree.

Hope it will be helpful to you

Good luck on your assignment ...

~pragya

6 0

3 years ago

If the inspection division of a county weights and measures department wants to estimate the mean amount of soft-drink fill in 2

nikklg [1K]

Answer:

n=97

Step-by-step explanation:

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Assuming the X follows a normal distribution

$X \sim N(\mu, \sigma=0.01)$

We know that the margin of error for a confidence interval is given by:

$Me=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The next step would be find the value of $\z_{\alpha/2}$ , $\alpha=1-0.95=.05$ and $\alpha/2=0.025$

Using the normal standard table, excel or a calculator we see that:

$z_{\alpha/2}=1.96$

If we solve for n from formula (1) we got:

$\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}$

$n=(\frac{z_{\alpha/2} \sigma}{Me})^2$

And we have everything to replace into the formula:

$n=(\frac{1.96(0.05)}{0.01})^2 =96.04$

And if we round up the answer we see that the value of n to ensure the margin of error required $\pm=0.01 Liters$ is n=97.

5 0

4 years ago

first number plus twice a second number is 8. Twice the first number plus the second totals 31. Find the number

ryzh [129]

Answer:

1st number = 18

2nd number = -5

Step-by-step explanation:

Let x be first number and y be the 2nd number.

We have been given that first number plus twice a second number is 8. We can represent this information as:

$x+2y=8...(1)$

We are also given that twice the first number plus the second totals 31. We can represent this information as:

$2x+y=31...(2)$

Now let us solve our system of equations using substitution method.

From equation (1) we will get,

$x=8-2y$

Substituting $x=8-2y$ in equation (2) we will get,

$2(8-2y)+y=31$

$16-4y+y=31$

$-4y+y=31-16$

$-3y=15$

$y=\frac{15}{-3}$

$y=-5$

Therefore, the second number is -5.

Now let us substitute y=-5 in equation (1).

$x+(2*-5)=8$

$x-10=8$

$x=8+10$

$x=18$

Therefore, the first number is 18.

4 0

3 years ago

Write an equation in point-slope form for the line through the given point that has the given slope.

Dmitriy789 [7]

In point slope form: (y-2)= -5/3(x-4)

3 0

3 years ago

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