Y=-x2 What is the graph

Mathematics

1 answer:

Mama L [17]4 years ago

3 0

Answer:

photo math

Step-by-step explanation:

pohto math is very helpfull and it shows the graphs

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Suppose V is the midpoint of UW, and TV = XV. What additional information would you need to conclude that TUV = XWV using the SA

ladessa [460]

The SAS theorem states that if two sides and the included angle from a triangle are equal to two sides ans the included anfle from another triangle they are congruent.

The information that you would need to cloclude the congruency is that sides UV and VW are equal, and that the included angles are the sam on both triangles.

7 0

1 year 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:

$X \sim N(3.25,0.05)$