What is the probability of getting exactly 2 heads when flipping three fair coins?

Answers

Answer 1

Answer:

t0he answer to this question is 1/4

Step-by-step explanation:

Answer 2
This is called a binomial distribution, and the sizes of the events "got k heads out of n coin flips" are called binomial coefficients. Consider all the possible ways to get two heads, HHT,HTHandTHH. There are 2⋅2⋅2=8 possible combinations in total. Therefore, the answer is 3/8.

Related Questions

What's your biggest wish this Christmas?! :D <3

Answers

Answer:

To Get a new phone

Step-by-step explanation:

plz help, The graph of y = f(x) is shown below. What are all of the real solutions of f(x) = 0?

Answers

Answer:

The real solutions of f(x)=0 are: 0, 2, 5, 6

Step-by-step explanation:

We are given:

The graph of y = f(x)

We need to find all of the real solutions of f(x) = 0?

By looking at the graph we need to find the values of y when x =0

Looking at the graph, when x=0 we get

0, 2,5 and 6

So, the real solutions of f(x)=0 are: 0, 2, 5, 6

I am attaching the figure, that determines the answers.

what is 32.23 + 4x?

ASAP

Answers

Answer:

cannot be simplified.

Santa needs to hire extra help for the busy season. 9 elves can pack 27 toys in Santa's sleigh in an hour.
How many elves are needed to pack 240 toys each hour?

Answers

Answer:

Number of elves= 80 elves

Step-by-step explanation:

If 9 elves can pack 27 toys per hour. This means that each elf packs 3 toys per hour:

Toys per elf= 27/9 = 3

Now, we need to determine the number fo elves needed to pack 240 toys per hour:

Number of elves= number of toys/toys per elf

Number of elves= 240/3

Number of elves= 80 elves

Under his cell phone plan, Elijah pays a flat cost of $64.50 per month and $5 per gigabyte. He wants to keep his bill at $87.50 per month

Answers

Gotta go stingy by adding 64.5 us 87.5

VERY URGENT

ALCULATOR
COLOR THEME
11
D) SPEAK OPTIO
1. The height of a cylinder is 6 centimeters. The
circumference of the base of the cylinder is 187. Solve
and explain how you would find the measurement of
they cylinder's volume in cubic centimeters. Be specific,
include any formulas you will need, identify the
components of the cylinder, explain whether you need
to round, and do not forget to include units of
measurements.
Academic Vocabulary:
height cylinder base
pi substitute volume
formula round
area
radius circumference
cubed squared

Answers

Answer:

16,713.4 cc

Step-by-step explanation:

You are given the height (6) and circumference (187) and the formula for the volume of the volume of a cylinder is [tex]\pi *r^{2} *h[/tex]. You first need to find the radius of the cylinder using the equation [tex]C=2\pi r[/tex]. Doing so, you get 29.76 cm for the radius. After this, you plug in 29.76 and 6 into the equation to get 16,713.4 cc.

When Sarah divided a number by 5, the quotient was 247 with a remainder. What is one possible dividend? With a complete sentence, explain how you found the dividend.

Answers

Answer:

One possible dividend is 1,237

Step-by-step explanation:

One possible dividend will be 1,237

This is because of we multiply 247 by 5, we get 1,235 and we can add 2 so we can have remainder 2

The difference between the next factor of 5 and the last one which has 247 as the multiple of 5 is 5

So adding 1,2,3 and 4 to the product will give a number that is not up to the next multiple of 5 and thus we can have our dividend with the remainder

Next door to me lives a man with his son. They both work in the same factory. I watch them going to work through my window. The father leaves for work ten minutes earlier than his son.one day I asked him about it and he told me that it takes 30 minutes for him to walk to his factory, whereas his son is able to cover the distance in only 20 minutes. If the father were to leave the house 5 minutes earlier then his son, then the son would catch up with his father in 2k minutes. where k is-----​

Answers

9514 1404 393

Answer:

  k = 5

Step-by-step explanation:

Suppose the distance to the factory is 1 unit. Then the speed the father walks is ...

  speed = distance/time = 1 / 30 . . . . units per minute

When the father leaves 10 minutes earlier than the son, his position t minutes after the son starts walking is ...

  d = 1/30(t +10)

Similarly, when the father starts 5 minutes earlier than the son, his position t minutes after the son starts walking is ...

  d = (1/30)(t +5)

We want that to be the same as the distance the son covers t minutes after he starts walking. The son's progress is ...

  d = 1/20t

To find the value of k such that the distance covered is the same 2k minutes after the son starts, we will use t=2k and d=d, so ...

  (1/30)(2k +5) = (1/20)(2k)

  4k +10 = 6k . . . . . multiply by 60

  10 = 2k . . . . . . . . . subtract 4k

  5 = k . . . . . . . . . . . divide by 2

__

The attached graph shows the different scenarios, where the blue line is the son's progress. When the father starts 5 minutes earlier, the son meets him half-way to the factory after 10 minutes, so k = 10/2 = 5.

Food World sells a 6 lb. bag of potatoes for $5.70. Which of the following is NOT an equivalent price per pound of potatoes?

A 7 lb. bag for $6.65

B 20 lb. bag for $19.00

C 16 lb. bag of $14.45

B 9 lb. bag for $8.55

Answers

I think it would be C

Under his cell phone plan, Samuel pays a flat cost of $41.50 per month and $5 per gigabyte. He wants to keep his bill at $52.50 per month. Write and solve an equation which can be used to determine
x
x, the number of gigabytes of data Samuel can use while staying within his budget

Answers

Answer:

2.2 gigabytes

Step-by-step explanation:

Let us represent

x = the number of gigabytes of data Samuel can use while staying within his budget

Therefore, our equation is:

$41.50 + $5 × x = $52.50

41.50 + 5x = 52.50

Subtract 41.50 from both sides

41.50 - 41.50 + 5x = 52.50 - 41.50

5x = 11

x = 11/5

x = 2.2 gigabytes.

The number of gigabytes of data he need to keep his monthly cost at $52.50 is 2.2 gigabytes

12. A plot of land measures 200m by 50m. Find its area in hectares. *
2 points
O A. 10ha
B. 100ha
C. 1ha
D. 10,000ha​

Answers

Answer: C

Explanation:
200 x 50 = 10,000
10,000 square metres = 1 hectare

What number could replace kkk below? \dfrac{k}{100} = \dfrac{1}{10} 100 k ​ = 10 1 ​ start fraction, k, divided by, 100, end fraction, equals, start fraction, 1, divided by, 10, end fraction k={}k=k, equals

Answers

Answer:

k = 10

Step-by-step explanation:

Given the equation;

[tex]\dfrac{k}{100} = \dfrac{1}{10}[/tex]

We are to find the value of k.

Cross multiply;

[tex]\dfrac{k}{100} = \dfrac{1}{10} \\10 \times k = 100 \times 1\\10k = 100\\[/tex]

Divide both sides by 10

[tex]10k/10 = 100/10\\k = 10[/tex]

Hence the value of k is 10

Answer:

100/9

Step-by-step explanation:

On Khan

Help with congruent angles - please----


State if the 2 angles are congruent.

If they are, state how you know- for example SSS or SAS.

Answers

Answer:

No, they are not congruent, see why below

Step-by-step explanation:

The red lines indicate corresponding angles. Here we see 2 corresponding congruent sides and 1 corresponding congruent angle. The SAS postulate states that we can conclude a triangle is congruent if we have 2 sides and 1 angle as being congruent. However, on closer inspection, we will notice that the angle is not actually corresponding. The first triangle has the angle between the two sides marked, but the second one has the angle on the other side marked. Because of this, we cannot conclude the triangles are congruent.

An ice cream cone has a height of 11cm and a diameter of 4.5 cm. Which value best represents the amount of ice cream the cone can hold.

Answers

Answer:

D. 58cm

Step-by-step explanation:

Hi Alondra, umm...  I looked this up and saw your name. This is on the final right.

Andrew Moreno

Answer:

An ice cream cone has a height of 11cm and a diameter of 4.5 cm. Which value best represents the amount of ice cream the cone can hold.

Step-by-step explanation:

Which of the following is equivalent to (2a + 5b) (a - 3b)?

A) 2a² - 2ab - 15b²
B) 2a² - ab 15b²
C) 2a² + 2ab - 15b²
D) 2a² + 11ab - 15b²

Answers

Answer:

Step-by-step explanation:

use foil and you will have

=2a^2-6ab+5ab-15b^2

=2a^2-ab-15b^2

i think is B, maybe you forgot a minus between ab and 15b^2

please help me......​

Answers

Answers:

x = 5

y = -5

==================================================

Work Shown:

3x + 2y - 5 = 0

3(y+10) + 2y - 5 = 0 ... replace x with y+10

3y+30+2y-5 = 0 .... distribute

5y+25 = 0

5y = -25 .... subtract 25 from both sides

y = -25/5 .... divide both sides by 5

y = -5

Use this y value to find x

x = y+10

x = -5+10

x = 5

------------------

As a way to check, plug these x and y values into the first equation

3x + 2y - 5 = 0

3(5) + 2(-5) - 5 = 0

15 - 10 - 5 = 0

5 - 5 = 0

0 = 0

This confirms the first equation and helps confirm our answers.

PLEASE HELP!!! WILL GIVE BRAINLIEST!!!

Answers

Angle 1 is 112

Angle 2 is 68

Angle 3 is 90

Angle 4 is 90

Angle 5 is 22

Angle 6 is 158

Change the following sentences as in dire
a. Let him write an email (into passive)
MA​

Answers

Answer:

let the email be written by him.

Hahahajdjdjdsjsjsjsjsjsjdjd

pls help me 20 points

Answers

Answer:

the length of the minute hand is 36/100 . 150 = 54 (mm)

y is the distance between the minute hand and the hour hand now

x is the angle beween the minute hand and the hour hand, so we have:

cos x = 36/54 = 2/3 => sin x = [tex]\sqrt{1-(\frac{2}{3})^{2} }=\frac{\sqrt{5} }{3}=\frac{y}{54}[/tex]  => y = 18√5 (mm)

a) see in the ques, u can see that in 45', the minute hand will move a distance equal to 2 times its length and a distance = 2.18√5 (mm)

=> the distance which the minute hand will move is 54.2 + 2.18√5 = 188,50 (mm)

b) the distance which the minute hand will move in 1h is 54.4 - 18√5 = 175,75(mm)

the distance which the hour hand will move in 1h is 36.4 = 144 (mm)

=> the minute hand will move: 175,75 - 144 = 31,75(mm) further than the hour hand

Step-by-step explanation:

Sarah made a certain number of bracelets for a craft show. Maria made 7 more than Sarah. Julie made 3 times as many as Maria.

Which expression represents the total number of bracelets Julie made if Sarah made s bracelets?
3s + 7
s + 21
21s
3(s + 7)

Answers

The answer is Option 4: 3(s+7)

Answer:

D

Step-by-step explanation:

Write the equation for a parabola with a focus at (-7,-5) and a directrix at x = -4

Answers

Answer:

y² + 10y + 6x + 58 = 0

Step-by-step explanation:

Focus of the parabola has been given as (-7, -5) and directrix as x = -4

Let a point on the parabola is (x, y).

By the definition of a parabola, "distance of a point on parabola is equidistant from focus and directrix".

Distance from focus of the given point = [tex]\sqrt{(x+7)^2+(y+5)^2}[/tex]

Distance of the point from directrix = [tex]\sqrt{(x+4)^2}[/tex]

Therefore, equation of the parabola will be,

[tex]\sqrt{(x+7)^2+(y+5)^2}=\sqrt{(x+4)^2}[/tex]

[tex](x+7)^2+(y+5)^2=(x+4)^2[/tex]

x² + 14x + 49 + y² + 10y + 25 = x² + 8x + 16

y² + 14x + 10y + 74 = 8x + 16

y² + 10y + 6x + 58 = 0

Answer:

(y+5)^2/6 - 11/2

Step-by-step explanation:

please help, i will mark you branniest :))

solve for k

3/k = 4/5

Answers

Answer:

3/k = 4/5

k = 3 divided by 4/5

k = 3.75

Step-by-step explanation:

Given that $-3 \leq x \leq 2$ and $20x^{2} = y-24$, what is the least possible value for $y$?

Answers

Answer:

24

Step-by-step explanation:

The least possible value is when 20x^2 = 0. All other values give a larger value than 0. Thus, the minimum value for y = 24.

Answer:

24

Step-by-step explanation:

1. Solve the system of equations: 4x-y=14 and x=y+2
O (4,2)
O (2,4)
O (6,2)
0 (2,6)

Answers

Answer:

The second one

Step-by-step explanation:

4x-y=14

4(y+2) -y=14

4y+8-y=14

3y=14-8

3y=6

y=2

x=2+2

x=4

Answer:

y=2 x=4

a. (4,2)

simple. easy. awesome. xfinity

Work out the percentage change to 2 decimal places when a price of £198 is increased to £209.99.

Answers

Answer:

The percentage change = 6.05%

Step-by-step explanation:

New value = £209.99

Old value = £198

Percentage change = [New Value - Old Value] / [Old Value] × 100

                                 = [209.99 - 198] / [198] × 100

                                 = [11.99] / [ 198] × 100

                                 = 0.06 × 100

                                 = 6.05%

Therefore, the percentage change = 6.05%

HELP ASAP!!!!!!!! PLSSSSSSS HURRY!!!
Consider the function f(x) = 6 sine (x minus StartFraction pi Over 8 EndFraction) + 8. What transformation results in g(x)6 sine (x minus StartFraction 7 pi Over 16 EndFraction) + 1?

A.) Translate StartFraction 5 pi Over 16 EndFraction units left and 7 units up.
B.) Translate StartFraction 5 pi Over 16 EndFraction units right and 7 units up.
C.) Translate StartFraction 5 pi Over 16 EndFraction units left and 7 units down.
D.) Translate StartFraction 5 pi Over 16 EndFraction units right and 7 units down.

Answers

Answer:

D

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

used graphing calculator

You deposit $7,425 into a savings account

Answers

You deposit $7,425 into a savings account and?

Answer:

wow then u saved $7425 in your savings account

Step-by-step explanation:

B is the midpoint of segment AC, What is the length of AC?
А
B
3X + 4
5X-6

Answers

24 times 6 with a little bit of 4

If
s= t+7s/5 and s= -2 what is the value of t?

A) -24
B) -4
C) 4
D) 24

Answers

Answer:

C

Step-by-step explanation:

Given

s = [tex]\frac{t+7s}{5}[/tex] ← substitute s = - 2 into the equation

- 2 = [tex]\frac{t+7(-2)}{5}[/tex] ( multiply both sides by 5 to clear the fraction

- 10 = t - 14 ( add 14 to both sides )

4 = t → C

Darin has 3 pairs of tennis shoes, 4 pairs of pants, 6 shirts, 2 belts, and 3
hats. Darin makes an outfit by choosing one of each type of item. How
many unique outfits can Darin make?
A). 18
B). 42
C). 144
D). 432

Answers

I would say A) or B) but I would say B) because you can take different clothing pieces to Match with many others
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