someone please answer this, ill give you brainliest and your getting 100 points.

The probability that a person who is older than 35 years has a hemoglobin level between 9 and 11 is given by: Option B: 0.284 approx.

Suppose two dimensions are there, viz X and Y. Some values of X are there as [tex]X_1, X_2, ... , X_n[/tex] and some values of Y are there as [tex]Y_1, Y_2, ... , Y_n[/tex]

List them in title of the rows and left to the columns. There will be [tex]n \times k[/tex] table of values will be formed(excluding titles and totals), such that:

Value(ith row, jth column) = Frequency for intersection of  [tex]X_i[/tex]  and [tex]Y_j[/tex]  (assuming X values are going in rows, and Y values are listed in columns).

Then totals for rows, columns, and whole table are written on bottom and right margin of the final table.

For n = 2, and k = 2, the table would look like:

[tex]\begin{array}{cccc}&Y_1&Y_2&\rm Total\\X_1&n(X_1 \cap Y_1)&n(X_1\cap Y_2)&n(X_1)\\X_2&n(X_2 \cap Y_1)&n(X_2 \cap Y_2)&n(X_2)\\\rm Total & n(Y_1) & n(Y_2) & S \end{array}[/tex]

where S denotes total of totals, also called total frequency.

n is showing the frequency of the bracketed quantity, and intersection sign in between is showing occurrence of both the categories together.

Suppose that there are finite elementary events in the sample space of the considered experiment, and all are equally likely.

Then, suppose we want to find the probability of an event E.

Then, its probability is given as

[tex]P(E) = \dfrac{\text{Number of favorable cases}}{\text{Number of total cases}} = \dfrac{n(E)}{n(S)}[/tex]

where favorable cases are those elementary events who belong to E, and total cases are the size of the sample space.

The missing frequency table is attached below. If we name events as:

Then, the needed probability is P(B|A) (as it is already specified that the person would be older than 35 years.)

Using the table, we get:

[tex]P(A) = \dfrac{\text{Total person who are older than 35 years age}}{\text{Total person in survey}}\\\\P(A) = \dfrac{162}{429} \approx 0.3776[/tex]

Using the table, we get the value on the place where A and B both occur(when person selected is older than 35 years and have hemoglobin between 9 and 11 ) as:

[tex]n(A \cap B) = 162 - 40 - 76 = 46[/tex]

Thus, we get:

[tex]\\\\P(A\cap B) = \dfrac{\text{Total person older than 35 years age and have hemoglobin level between 9 and 11}}{\text{Total person in survey}}\\\\P(A \cap B) = \dfrac{46}{429} \approx 0.1072[/tex]

Using the chain rule, we get:

[tex]P(B|A)P(A) = P(A\cap B)\\\\P(B|A) = \dfrac{P(A \cap B)}{P(A)} = \dfrac{0.1072}{0.3776} \approx 0.284[/tex]

Thus, the probability that a person who is older than 35 years has a hemoglobin level between 9 and 11 is given by: Option B: 0.284 approx.

Learn more about probability here:

brainly.com/question/1210781

Answer:

7

Step-by-step explanation:

x=13

x-6

replace x with 13

13-6

7

The known facts

Now, let's set up the equations where N is Natalie's age and F is Fred's age.

N + F = 36   ---- equation 1

N + 4F = 72 ---- equation 2

equation 2 minus equation 1 ---> 3F = 36 ---> F = 12, thus N = 24

Thus Fred is 12 years old, and Natalie is 24 years old.

Answer:

in this problem, we are going to translate our words into a mathematical equation, solve the equation and then answer the question. So we have, the father is three years older than the mother, so is three, is our answer there for this equation. So if we take the oldest minus the youngest, It would give us a difference of three. So since the father is older, we're going to say the father's age minus the mother's age is three, So we know that the mother is 42 years old, So the father minus the 42 would give us three. So to solve for F, we're going to use the addition property of equality and add 42 to both sides. So F -40 to plus 42 is F and Add 42 to both sides, and three plus 42 is 45. So this means that the father is 45 years old.

Step-by-step explanation:

Mark me brainliest!!

Answer: Hope this helps <3

Step-by-step explanation:

Answer:

3/4=6/8

Step-by-step explanation:

This is equal because 3/4 + 3/4 = 6/8. So this is your answer.

Hope this helped! :) Have a good day!!

Answer:

[tex] \frac{3}{4} = \frac{6}{8} [/tex]

Explanation:

divide the second fraction by 2 -> 6÷2/8÷2 -> 3/4

Answer:

first term :9=a

common difference: 2 =d

A6=a+5d

=9+5(2)

=19

no of terms =9

[tex]s{n} = \frac{n}{2} (a + an) \\ = \frac{6}{2} (9 + 19) \\ = 3(28) \\ = 84[/tex]

Answer:

219.8

Step-by-step explanation:

you multiply 70 and 3.14 and get 219.8

Answer:

The answer is 219.8

Step-by-step explanation:

I took the test

Answer:

The largest smallest degree of f(x) + a*g(x) is 1.

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Answer:

(9,3)

Step-by-step explanation:

Use elimination to solve.

-2 (-3x + 3y = -18)

6x - 6y = 36

-6x - 3y = -63

The 6x and -6x are eliminated and you are left with -9y = -27 when you combine -6y and -3y, and 36 - 63.

y = 3

Then, substitute 3 into either equation to find x

-3x + 3(3) = -18

-3x + 9 = -18

-3x = -27

x = 9

Answer:

should be C

Step-by-step explanation:

Answer:

C

Step-by-step explanation: took the test

[tex]\\ \rm\Rrightarrow 2x+2y=28[/tex]

[tex]\\ \rm\Rrightarrow x+y=14[/tex]--(1)

And

[tex]\\ \rm\Rrightarrow (x-y)^2=(x+y)^2-4xy[/tex]

[tex]\\ \rm\Rrightarrow (x-y)^2=14^2-4(45)=196-180[/tex]

[tex]\\ \rm\Rrightarrow (x-y)^2=16[/tex]

[tex]\\ \rm\Rrightarrow x-y=4[/tex]--(2)

Adding (1) and (2)

And

Answer:

B) 9 in x 5 in

Step-by-step explanation:

Let W = width of rectangle

Let L = length of rectangle

Area of a rectangle = WL

Perimeter of a rectangle = 2W + 2L

Given area = 45 and perimeter = 28:

⇒ WL = 45

⇒ 28 = 2W + 2L

Rewrite 28 = 2W + 2L to make W the subject:

⇒ 2W = 28 - 2L

⇒ W = 14 - L

Substitute W = 14 - L into WL = 45 and solve for L:

⇒ (14 - L)L = 45

⇒ 14L - L² = 45

⇒ L² -14L + 45 = 0

⇒ (L - 9)(L - 5) = 0

⇒ L = 9, L = 5

Substitute found values of L into W = 14 - L and solve for W:

⇒ W = 14 - 9 = 5

⇒ W = 14 - 5 = 9

As width < length, length = 9 in and width = 5 in

Answer:

45 is the answer I think I don't know

the answer is: (7k−6)(4k²+7)

Answer:

8 out of 20 or 2 out of 5(both anwsers are correct)

Answer:

Step-by-step explanation:

The answer is (B), because the rate of the function is 0.50 from 0 to 8 ounces, thus the line should have a slope of 1/2. But afterward, it levels off horizontally as every ounce above 8 ounces to 12 ounces is $4.

Hope that helps!

Answer:

B

Step-by-step explanation:

Since it is 0.5 per serving between 0 and 8 ounces the graph would intersect at (1, 0.5) and it does for B. And then it says $4 for any serving 8 oz and 12 oz. B shows that the line changes to 4 dollars when it reaches 8 oz. Sorry for the terrible explanation.

Answer:

5/7

Step-by-step explanation:

Hi, so the question is simplify 25/35. each fraction can be divided by five.

So each will be divided by five. So, first the numerator which is the top of the fraction. 25/5=5 so the new simplified top is 5.

The denominator, the bottom fraction, 35/5= 7, so the new simplified denominator is 7.

Refix the fraction and you have that 25/35 = 5/7

Answer:

5/7

Step-by-step explanation:

Say you got a 25 out of 35 questions right on a test you got 5/7 of them correct and get a 71.43% right.

Or think of it like 7 can go into 35 a total of 5 times and 5 can also go into 25 5 times.

Hope this helps have a great day:)

Answer:

Step-by-step explanation:

To find the slope, we use the slope formula

m = (y2-y1)/(x2-x1)

   = ( 4-4)/( 5 - -3)

   = 0/ ( 5+3)

  = 0/8

 = 0

Answer:

1) first one is 7/12

the second one is 45

as the chance of getting a 3,9 or 11 is 3/12

So you do 3/12 x 180 = 540/12 which is simplified to 45.

Answer: 61 degrees

Step-by-step explanation:

Answer:

same

Step-by-step explanation:

since if a central angle measures 87 then its arc will measure the same because the length of the arc equals the radian measure of the angle

Answer:

Yes, the graph is proportional

Step-by-step explanation:

This graph is proportional because the origin (where the line starts) is at

(0, 0)

Hope this helps! Let me know if you still don't understand :)

Answer:

No, because it has repeating domains (x-values) which is -2

Step-by-step explanation:

A function should not have repeating x-values.

Answer: 12

Step-by-step explanation: V of prism = S of triangle*Height of prism

height of prism is 30

S of triangle = a/2*h( a =18 cm)

3240=30*(18/2)*h

h=3240/(9*30)=12

Two ways are there

Make it simple, go through second way

[tex]\\ \rm\Rrightarrow h^2=15^2-9^2[/tex]

[tex]\\ \rm\Rrightarrow h^2=225-81[/tex]

[tex]\\ \rm\Rrightarrow h^2=144[/tex]

[tex]\\ \rm\Rrightarrow h=12cm[/tex]

Answer:

312 people

Step-by-step explanation:

Hello!

Step 1:

First, we want to calculate what percentage of the random sample voted pretzels. To do that, we divide the number of pretzel voters depending on the total number of voters.

Calculate:

So, approximately 12% of the sample voted on pretzels.

Step 2:

Now that we know the average percentage of people that want pretzels, we can find the same percentage of the actual population of 2600 people.

We need to solve for 12% of 2600

Calculate:

Based on our percentages, we predict that 312 people favor pretzels.

I don't know exactly what you're asking but 80% of 100 is 80

Answer:

Option A

Step-by-step explanation:

Given the following question:

[tex]x < -1[/tex]

Keep a few things in mind when graphing the inequality:
. x value is less than -1 (which means the line will go in the direction of the x)
. < is a greater sign not greater than or equal (≤) so it would be a open dot.
. The number line starts at -1.

According to all this information your answer is indeed option A.

Hope this helps.

Answer:

1. k = 240

2. [tex]y=\dfrac{240}{x}[/tex]

3. 30 hours

Step-by-step explanation:

1.  if y varies inversely:

[tex]\implies y=\dfrac{k}{x}[/tex]

[tex]\implies 40=\dfrac{k}{6}[/tex]

[tex]\implies k=240[/tex]

2.

[tex]\implies y=\dfrac{240}{x}[/tex]

3. If x = 8:

[tex]\implies y=\dfrac{240}{8}=30[/tex]