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3 years ago

Please help I’m begging y’all please

Mathematics

2 answers:

Oksana_A [137]3 years ago

8 0

$\text{Given that,}\\\\(x_1,y_1) = (0,1) ~~~ \text{and}~~~ (x_2,y_2) = (4,-1)\\\\\\\text{Slope,}~~ m = \dfrac{y_2 - y_1}{x_2 - x_1} = \dfrac{-1 -1}{4-0} = - \dfrac 24 = -\dfrac 12\\\\\\\text{Equation with given points,}\\\\\\y -y_1 = m(x-x_1)\\\\\implies y -1 = -\dfrac 12(x - 0)\\\\\implies y = -\dfrac 12x +1\\\\\text{This is the slope - intercept form (y=mx+b)}$

juin [17]3 years ago

7 0

Y= -1/2+1 thats is the answer, the slope is 1 if you need it

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Pls help me!!!! I will give brainliest!!!!

Gwar [14]

Answer:

Step-by-step explanation:

because the numbers 0-9 consist of 10 numbers,

having a 70% chance of success means that out of the 10 numbers, 7 are correct.

thus, choice B is correct as it have 7 numbers in it

(rmb to count "0" as a number!)

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3 years ago

Read 2 more answers

What is the diameter of a circle with the endpoints (4, 3) and (4, -3)?

Dahasolnce [82]

Given the endpoints of our diameter, we can use the distance formula to find the distance between the points.

Distance Formula:

$\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2$

( $x_2$ and $x_1$ are the x-values of the coordinates and $y_2$ and $y_1$ are the y-values of the coordinates)

Inserting our values into the distance formula we can find the length of the diameter:

$\sqrt{(4 - 4)^2 + (-3 - 3)^2}$

$\sqrt{(-6)^2}$

$\sqrt{36} = \boxed{6}$

The diameter of our circle is 6, or choice C.

3 0

3 years ago

Plzz answer number B

likoan [24]

Answer:

4 hours

Step-by-step explanation:

It drives 240 miles per 2 hours so then 480 will be 2+2 = 4 hours

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3 years ago

A bank is trying to determine which model of safe to install. The bank manager believes that each model is equally resistant to

alexandr402 [8]

Answer:

So on this case the 95% confidence interval would be given by (-1.152;5.152).

$-1.152 < \mu_{safe1}-\mu_{safe2}$

Should we conclude that the average time it takes experts to crack the safes does not differ by model at the 5% significance level?

A) Yes, the 95% confidence interval for ?D contains 0.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

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".

Solution

Let put some notation

x=value for Safe 1 , y = value for Safe 2

x: 103, 90, 64, 120, 104, 92, 145, 106, 76

y: 101, 94, 58, 112, 103, 90, 140, 110, 74

The first step is calculate the difference $d_i=x_i-y_i$ and we obtain this:

d: 2, -4, 6, 8, 1, 2, 5, -4, 2

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{18}{9}=2$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =4.093$

The next step is calculate the degrees of freedom given by:

$df=n-1=9-1=8$

Now we need to calculate the critical value on the t distribution with 8 degrees of freedom. The value of $\alpha=1-0.95=0.05$ and $\alpha/2=0.025$ , so we need a quantile that accumulates on each tail of the t distribution 0.025 of the area.