All categories

3 years ago

Desmond is 3 inches taller than Niki.

1 answer:

Colt1911 [192]3 years ago

7 0

Hey, let’s use y to represent Desmond’s height. Since we are trying to find Desmond’s height, we”ll start off with y =
We know that Desmond’s height is equal to Niki’s height + 3 inches. So the answer would be, y = x + 3.
Hope this helps :)

You might be interested in

I like how no one is helping me oh well I guess I will fail

Eddi Din [679]

Your answer is chicken tenders.

I put dedication into this response.

5 0

3 years ago

A straight line passed through the points (3,4) and (3,8). what is the question of the line?

sveticcg [70]

Answer:

x - 3 = 0

Step-by-step explanation:

Click on this link, for I cant explain things very well :(

www.mathportal.org/calculators/analytic-geometry/two-point-form-calculator.php?val1=3&val2=4&val3=3&val4=8&rb1=gen

6 0

3 years ago

A certain industrial process yields a large number of steel cylinder whose lengths are distributed normally with mean 3.25 inche

Taya2010 [7]

Answer:

$Y = X_1 + X_2$

If we find the expected value of Y we got:

$E(Y) = E(X_1) + E(X_2) = 3.25 + 3.25 =6.5$

And for the variance we assume that we have independent random variables for X1 and X2 so then we have:

$Var(Y) = Var(X_1) + Var(X_2) = \sigma^2 + \sigma^2 = 2 \sigma^2 = 2*(0.05^2) = 0.005$

And the deviation $Sd(Y) = \sqrt{0.005}=0.0707$

So then our random variable Y have the following distribution:

$Y \sim N (\mu =6,5 , \sigma = 0.0707)$

And we want to find this probability:

$P(Y$

And we can use the z score formula given by:

$z=\frac{y -\mu_y}{\sigma_y}$

And if we use the z score formula we got:

$P(Y$

Step-by-step explanation:

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

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

$X \sim N(3.25,0.05)$

Where $\mu=3.25$ and $\sigma=0.05$

We slect two observations $X_1, X_2$

And let denote the combined lenght as:

$Y = X_1 + X_2$

If we find the expected value of Y we got:

$E(Y) = E(X_1) + E(X_2) = 3.25 + 3.25 =6.5$

And for the variance we assume that we have independent random variables for X1 and X2 so then we have:

$Var(Y) = Var(X_1) + Var(X_2) = \sigma^2 + \sigma^2 = 2 \sigma^2 = 2*(0.05^2) = 0.005$

And the deviation $Sd(Y) = \sqrt{0.005}=0.0707$

So then our random variable Y have the following distribution:

$Y \sim N (\mu =6,5 , \sigma = 0.0707)$

And we want to find this probability:

$P(Y$

And we can use the z score formula given by:

$z=\frac{y -\mu_y}{\sigma_y}$

And if we use the z score formula we got:

$P(Y$

3 0

3 years ago

This is math And its hardishhhh :/

Colt1911 [192]

Answer:

First,i would add all the numbers up which is 14+9+12+13+12=60.Then,i would find the total number of people in there which is 5.After that,i would divide 60 by 5 which is 12.Each person will get 12 pencils.

Step-by-step explanation:

If u have anymore questions,let me know and i will be right there:D

4 0

3 years ago

Read 2 more answers

The following data of students weights (in kg) is collected 65 48 52 55 62 58 47 53 65 71 54 62 51 49 54 60 68 53 57 62 59

tatuchka [14]

Answer:

i dont know

Step-by-step explanation:

hynmk,likujnyhbgfd

3 0

3 years ago