All categories

3 years ago

Someone please help me its urgent What is the equation of the directrix

Mathematics

2 answers:

bija089 [108]3 years ago

6 0

Answer:

Step-by-step explanation:

y=-1

sleet_krkn [62]3 years ago

6 0

Answer: Hello, The answer to this question is y=-1

Step-by-step explanation:

You might be interested in

The numbers -12, -7, -2, 3, ... follow a pattern. What are the next three numbers in this pattern?

liq [111]

Answer:

8, 13, 18

Step-by-step explanation:

Its adding 5 each time so it ends up at positive values all the way up to 18

5 0

3 years ago

A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic

goldfiish [28.3K]

Answer:

(a) The proportion of women who are tested, get a negative test result is 0.82.

(b) The proportion of women who get a positive test result are actually carrying a fetus with a chromosome abnormality is 0.20.

Step-by-step explanation:

The Bayes' theorem states that the conditional probability of an event E $_{i}$ , of the sample space S, given that another event A has already occurred is:

$P(E_{i}|A)=\frac{P(A|E_{i})P(E_{i})}{\sum\liits^{n}_{i=1}{P(A|E_{i})P(E_{i})}}$

The law of total probability states that, if events E₁, E₂, E₃... are parts of a sample space then for any event A,

$P(A)=\sum\limits^{n}_{i=1}{P(A|B_{i})P(B_{i})}$

Denote the events as follows:

X = fetus have a chromosome abnormality.

Y = the test is positive

The information provided is:

$P(X)=0.04\\P(Y|X)=0.90\\P(Y^{c}|X^{c})=0.85$

Using the above the probabilities compute the remaining values as follows:

$P(X^{c})=1-P(X)=1-0.04=0.96$

$P(Y^{c}|X)=1-P(Y|X)=1-0.90=0.10$

$P(Y|X^{c})=1-P(Y^{c}|X^{c})=1-0.85=0.15$

(a)

Compute the probability of women who are tested negative as follows:

Use the law of total probability:

$P(Y^{c})=P(Y^{c}|X)P(X)+P(Y^{c}|X^{c})P(X^{c})$

$=(0.10\times 0.04)+(0.85\times 0.96)\\=0.004+0.816\\=0.82$

Thus, the proportion of women who are tested, get a negative test result is 0.82.

(b)

Compute the value of P (X|Y) as follows:

Use the Bayes' theorem:

$P(X|Y)=\frac{P(Y|X)P(X)}{P(Y|X)P(X)+P(Y|X^{c})P(X^{c})}$

$=\frac{(0.90\times 0.04)}{(0.90\times 0.04)+(0.15\times 0.96)}$

$=0.20$

Thus, the proportion of women who get a positive test result are actually carrying a fetus with a chromosome abnormality is 0.20.

6 0

3 years ago

The slope of a line is . What is the slope of a line perpendicular to this line?

shtirl [24]

Answer:

there's no picture

Step-by-step explanation:

7 0

3 years ago

The roof is leaking in Tim's cabin. He has put small containers (all the same size) and large containers (all the same size) aro

professor190 [17]

Answer:

The large container holds 6 cups of water

Step-by-step explanation:

If two small containers and one large container equal 10 cups and one large minus one small equals 4 cups then that means that each small container has to equal 2 cups of water.

5 0

3 years ago

Select all that apply to describe the association of this scatterplot

raketka [301]

Negative, Nonlinear,
I hope this helped:)

6 0

3 years ago