In a class of 30 students, 12 have a brother and 25 have a sister. There are 2 students who do not have any siblings. What is the probability that a student who has a brother also has a sister?​

Answers

Answer 1
12 I think , actually I am not sure about this , if it is wrong count on me

Related Questions

Hi his figure is made up of unit cubes, each with a volume of 1 cubic unit.
What is the volume of the figure?
( photo is attached)
(Will give brainliest if you help)

Answers

Answer:

D. 100 cubic units

Step-by-step explanation:

There are 10 cubes in each layer (count at the top) and 10 layers (from top to bottom) in total. Multiply these to get volume.

10 x 10 =100

Answer:

B. 60 cubic units

Step-by-step explanation:

Formulas for a cube:

The volume of a cube:

V = a3

The surface area of a cube:

the area of each face (a x a) times 6 faces

S = 6a2

Face diagonal of a cube:

By the Pythagorean theorem, we know that

f2 = a2 + a2

Then f2 = 2a2

solving for f we get

f = a√2

Diagonal of the solid cube:

Again, by the Pythagorean theorem, we know that

d2 = a2 + f2

substituting f into this equation we get

d2 = a2 + (a√2)2 = a2 + 2a2 = 3a2

solving for d we get

d = a√3

What is the probability of choosing a red card or a face card from a deck of cards? Type your answer as a fraction.

Answers

The probability of choosing a red card or a face card from a deck of cards will be 19/26.

What is probability?

Its simple notion is that something will most likely occur. The favorable event's proportion to the overall number of occurrences.

Then the probability of choosing a red card or a face card from a deck of cards will be

We know that there are 52 cards in a deck of cards.

Then the total event will be

Total events = 52

And we know that a face card means a king, queen, or jack.

And the favorable event will be

Favorable event of face card = 12

Favorable event of red card = 26

Then the probability will be

P = 12 / 52 + 26 / 52

P = 3 / 13 + 1 / 2

P = 19 / 26

More about the probability link is given below.

https://brainly.com/question/795909

#SPJ1

If x varies directly as y, find x when y = 8.
x = -4 when y = 10
X =

Answers

Answer:

9.6

Step-by-step explanation:

I think!

Find the total surface area: ​

Answers

Answer:

612 cm²

Step-by-step explanation:

Total surface area = area of all the nets in that make up the shape

✔️There are 2 equal rectangles of the following dimensions:

L = 10 cm

W = 4 cm

Area = 2(10*4) = 80 cm²

✔️There are 2 equal rectangles of the following dimensions:

L = 10 cm

W = 17 cm

Area = 2(10*17) = 340 cm²

✔️There are 2 equal rectangles of the following dimensions:

L = 4 cm

W = 17 cm

Area = 2(17*4) = 136 cm²

✅Total surface area = 80 + 340 + 136 = 612 cm²

BRAINLIEST FOR CORRECT ANSWER ASAP

Answers

Answer:

A. 3x3x3x3 = 81 because you multiply 3 by itself 4 times

Answer:

it is 3×3×3×3=81 because it is said that

3 squared is 3×3 so I did the same tthing. hope it helps you good evening.

2. Write the equation of the circle with a center at
(-2, -8) and a radius of v10.

A. (x + 2)^2 + (y + 8)^2 = 25
B. (x - 2)^2 + (y – 8)^2 = 10
C. (x + 2)^2 + (y + 8)^2 = 10
D. (x + 2)^2 + (y + 8)^2 = 100
E. (x - 2)^2 + (y - 3)^2 = 100

Answers

Answer:

C. [tex] (x +2) ^2 +(y+8)^2 =10 [/tex]

Step-by-step explanation:

Center of the circle (h, k) = (-2, - 8)

Radius [tex] r=\sqrt {10}[/tex]

Equation of circle in center radius form is given as:

[tex] (x - h) ^2 +(y-k) ^2 =r^2 [/tex]

Plugging the values of h, k and r in the above equation, we find:

[tex] [x - (- 2)] ^2 +[y-(-8) ]^2 =(\sqrt {10})^2 [/tex]

[tex] (x +2) ^2 +(y+8)^2 =10 [/tex]

Find the missing side. Round
to the nearest tenth.
17
y
44°
Х
y=[?]

Answers

Answer:

The answer is 11.8

Step-by-step explanation:

The value of x and y is 12.2 and 11.8 respectively.

What is tangent of an angle?

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

What is sine of an angle?

The sine (sin) of an acute angle in a right angled triangle is the ratio between the side opposite the angle and the hypotenuse of the triangle.

According to the given question.

We have a right angled triangle.

In which one angle is 44 degrees and hypotenuse is 17 units.

Here,

With respect to angle 44 degrees the adjacent side is x and the opposite side is y.

Therefore,

Sine of 44 degrees is given by

[tex]sin44^{o} = \frac{opposite\ side }{Hypotenuse}[/tex]

[tex]\implies sin44^{o} = \frac{y }{17}[/tex]

[tex]\implies 0.6946 = \frac{y}{17}[/tex]

[tex]\implies 0.6946 \times 17 = y[/tex]

[tex]\implies y = 11.80[/tex]

[tex]\implies y = 11.8[/tex]

And, tangent of 44 degrees is give by

[tex]tan 44^{o} = \frac{opposite \ side }{adjacent \ side }[/tex]

[tex]\implies tan44^{o} = \frac{y}{x}[/tex]

[tex]\implies tan44^{o} = \frac{11.8}{x}[/tex]

[tex]\implies 0.9657 = \frac{11.8}{x}[/tex]

[tex]\implies x = \frac{11.8}{0.9657}[/tex]

[tex]\implies x = 12.22[/tex]

[tex]\implies x = 12.2[/tex]

Therefore, the value of x and y is 12.2 and 11.8 respectively.

Find out more information about tangent and sine of an angle here:

https://brainly.com/question/12465968

#SPJ3

Stacy started with $40 In a savings account that earns 5% annually. How much interest will she get in one year? ​

Answers

Answer:

$2

Step-by-step explanation:

She procures 5% of $40 every year. To discover the amount she makes in 1 year, increase 5% and 40,40*5%.Convert 5% to a decimal by isolating by 100.5%/100=0.05  40*0.05=2

Use the distributive property to write the sum of the product. 5z-10

Answers

Answer:

5(z-2)

Step-by-step explanation:

Linear parent function fis graphed on the grid.

Which graph best represents h(x) = -f(x) + 3?

Answers

It should be G, or the bottom left answer! I'm not sure about it but anyway I hope this helps!

Answer:option 2

Step-by-step explanation:

Tell whether the angles are complementary or supplementary. Then find the value of X​

Answers

the answer is x = 5!!!!

-8(n-5)= -2(4n+11)

SOMEONE PLEASE SOLVE IT PLEASEEEE

Answers

use Photomath and then you can get your answer!

Answer:

Use papa math

A ship left at the port at 9:00 p.m. and arrived at the next port at 5:00 a.m.
the next day. The distance between the 2 ports was 200 km.
Find the average
speed of the ship.
show solution​

Answers

Answer:

25km/h

Step-by-step explanation:

It would be helpful to understand the 24 hour clock in this case so you don't get confused by the AM and PM. For reference, 5 AM is technically 17AM, since 5 + 12 = 17.

The ship departed at 9pm, subtract that from 17 and you'll get 8 hours.

17 - 9 = 8

We know that there are 8 hours total, and since the ship traveled 200km, we set up a fraction, which is 8hr/200km. Since we want the average speed, we'll go by km/hr. To do this, we need to set the hrs to 1.

8/x = 1

x = 8

200/8 = 25

Your answer is 25km/hr

What is the slope of (2,3) and (5,-3)

Answers

Answer:

-2

Explanation:

Slope formula:

y2 - y1 ÷ x2 - x1

-3 - 3 = -6

5 - 2 = 3

-6 ÷ 3 = -2

Which line has a slope of 0?

Answers

y= -10
there is no x value so there is no slope, -10 is the y-intercept

Answer:

y =-10

Step-by-step explanation:

because there is no value of x so the slope of y is-10

Pls help!!!! It is khan academy and I’m giving 15 points!

Answers

The inequality would be in the direction of the arrow
The arrow is <—— so the inequality is <
The circle is colored so -3 in including making it less than or equal
x<-3
_

Or B

Write an equation that you will use to solve for x. Solve for x.

Answers

Answer:

Step-by-step explanation:

7x + 5 = 215

A high school student working a part time as a cook

Answers

Answer:

Is there supposed to be a picture???

Step-by-step explanation:

Ummmm what’s the question???

Help mehhhh plz ASAP

Answers

Answer:75

Step-by-step explanation:2 1/2 is equal to 5 halves. If each half is equal to 15 then all you do is multiply 15 by 5

What is the solution to the inequality x2 + 5x ≥ 6?

Answers

7x>6
.hopes it helps

Answer:

x ≤ –6 and x ≥ 1

Step-by-step explanation:

PLEASE HELPPP! I'LL GIVE BRAINLEST​

Answers

2 and 4
The number 3,124 when divided by 2 gives you 1,562, and when 3,124 is divided by 4 it gives you 781.

How many kilometers does Saturn travel in its orbit in one hour? ​

Answers

Answer:

Hey!! I found this online for you :)

Step-by-step explanation:

Saturn revolves or orbits around the Sun once every 29.4 Earth years, or once every 10,755.7 Earth days. Saturn travels at an average speed of 21,637 miles per hour or 34,821 kilometers per hour in its orbit around the Sun.

Hope this helps!

Have a nice day <3

how many 5/8 pound bags does it take to get 16 pounds of soil?

Answers

Answer:

10

Step-by-step explanation:

25.6 bags or 25 3/5 bags




If an object moves in uniform circular motion in a circle of radius R = 2.00 meters, and the object takes 5.00 seconds to complete ten revolutions, calculate the centripetal acceleration. ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. a= _____ m/s2 39.4 m/s 2 100. m/s 2 158 m/s 2 50.2 m/s 2

Answers

The centripetal acceleration of the object is .
Explanation:
We have,
Radius of a circular path is 2 m
It takes 5 seconds to complete 10 revolutions. It means its angular velocity is :

The centripetal acceleration of the object is given by :

So, the centripetal acceleration of the object is .

Plz help me well mark brainliest if correct!

Answers

Answer:

its C

Step-by-step explanation:

please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer: -7

Step-by-step explanation: -7 x -7 equals 49

James has a mass of 32.8 kg. Ricardo's mass is 8 3/4 kg more than James's. Winthorp's mass is 3.6 kg less than Ricardo's. What is the total mass of the three boys?

Answers

Answer:79.5

Step-by-step explanation:32.8+8.75=41.55 41.55-3.6=37.95 37.95+41.55+32.8=79.5

111.94 kg is the total mass of the three boys.

What is ratio?

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. An equation with two ratios set equal to one another is called a percentage.

given, James has a mass of 32.8 kg. Ricardo's mass is 8 3/4 kg more than James's. Winthrop's mass is 3.6 kg less than Ricardo's.

Since Mass of James = 32.8 kg

thus Mass of Ricardo = [tex]8\frac{3}{4}[/tex] + 32.8 = 41.55kg

And Mass of Winthrop = 41.55 - 3.6 = 37.59kg

Sum of mass of all three boys  = 32.8 + 41.55+ 37.59

Sum of the mass of all three boys = 111.94 kg

Therefore, the Total mass of the three boys is 111.94 kg.

Learn more about ratios here:

https://brainly.com/question/1504221

#SPJ2

help fast please i’m bad with math

Answers

i dont know but i think either B or A

Answer:

FALSE, TRUE, FALSE, FALSE

Step-by-step explanation:

pi/2>2 - FALSE

3pi>9 - TRUE

2pi-1<5 - FALSE

pi+8<11 - FALSE

Write impossible, unlikely, as likely as not, likely, or certain. Then, tell whether the probability is 0,close to 0, 1/2, close to 1, or 1 Picking a red marble from 4 white marbles and 7 green marbles

Answers

Answer:

Step-by-step explanation:

A medical researcher wants to determine whether a drug changes the body's temperature. Seven test subjects are randomly selected, and the body temperature (in degrees Fahrenheit) of each is measured. The subjects are then given the drug and after 20 minutes, the body temperature of each is measured again. The results are listed below. At α=0.05, is there enough evidence to conclude that the drug reduces the body's temperature? Subject 1 2 3 4 5 6 7 Initial Temperature 103.4 102.5 101.1 103.4 102.9 100.2 100.9 Second temperature 99.2 98.4 98.2 99 98.6 99.7 97.8

Answers

Answer:

Step-by-step explanation:

Other Questions
Eva buys online tickets to a play for her family. Each ticket costs $45.00 and there is a fee of $17.99 The table shows data Chargaff collected on DNA nitrogenous bases in five organisms.Percentages of Bases in Five OrganismsSource of DNA A T G CStreptococcus 29.8 31.6 20.5 18.0Yeast 31.3 32.9 18.7 17.1Herring 27.8 27.5 22.2 22.6Human 30.9 29.4 19.9 19.8E.coli 24.7 23.6 26.0 25.7Which statement did Chargaff conclude based on these data? Note that a letter in brackets, such as [A] or [C], refers to the concentration of one of the nitrogenous bases. A. in DNA molecules, [T] > [A] > [G] > [C] B. in DNA molecules [A] = [G], and [C ] = [T] C. in DNA molecules, [A] = [T], and [C ] = [G] D. in single-stranded DNA molecules, [A] = [T] = [C ] = [G] A company produces two products Product A selts for \$25 variable costs of 15and requires hours produce B for 35; variable costs of $20 and requires 5 machine hours to produce 40, 000mn machine hours are availableThe company can all can make of either Which statement is true? (honey locust bark tree i believe), what can you guess about the spines?A-They are old.B-They are soft.C-They are sharp.D-They are young. !! PLEASE HELP, 35 POINTS !!What is the value of x? Help me and Ill give you brainliest Tiana deposited $500 into an account that earns 6% simple interest. How many years will it take for the value of the account to reach $2000 AN object has a volumeof 77ml and a mass of429. What is the densityof this object? Name four things that you can find on both a dot plot and box plot. Find the measure of angle 1 Which of the following is the best definition of dialogue?A. When a character says things the reader knows are untrueB. When characters have a philosophical argumentC. When a character addresses ideas directly to the readerD. When characters speak to each other in conversation cette rue est BLANK et BLANK (typique/interessant) Whats the correct answer for this question? Read the following sentence.They just visit a cold machine that spews out the facts and the numbers, and the personalaspect of a library visit is gone.Why did the author most likely use the phrase "cold machine"?to characterize modern libraries as desertedBto characterize modern libraries as efficientthingto characterize modern libraries as objectiveDto characterize modern libraries as dispassionate Please help its due today! What are the solutions to this equation?7.D17-1There are no solutions. What is the value expression?-9 x 2.2 In figure find the value of x triangle PQR20 POINTSSSS Although she believed Jesus could heal her, the woman was afraid to get close to Him.What type of clause does the conjunction "although introduce?a. dependentb. independentc. adjectival What do the Battle of Verdun, the Battle of the Somme, and the Third Battle of Ypres have in common? They were quick and decisive Ally victories.BNew weapons were introduced.Germany gained a lot of ground.DThey resulted in very high numbers of casualties.