Mathematics High School

In a class of 30 students, 13 have a brother and 8 have a sister. There are 3 students who have a brother and a sister. What is the probability that a student who has a sister also has a brother?


Answer 3/8​

Answers

Answer 1

Answer:

[tex]P(sister) = \frac{8}{30} \\ [/tex]

Step-by-step explanation:

[tex]P(sister) = \frac{8}{30} \\ P(brother) = \frac{13}{30} \\ P(SnB) = \frac{3}{30} \\ [/tex]

Related Questions

hello please help i’ll give brainliest

Answers

Answer:

1. 1

2. 6

3. 3 or 4

Step-by-step explanation:

Answer:

1. 8 families have 3 children

2. 25 families are represented in the dot plot.

3. 20 families have less than 4 children

Someone help and plz make sure it’s RIGHT NO FLIES/LINKS/WEBSITES PLZ and will mark brainiest

Answers

Answer:

I'm pretty sure it's 18 degrees

Step-by-step explanation:

Paige is ⅕ her mother's age. If the sum of their ages us 30, how old is Paige?​

Answers

Answer:

I think it's 6 but im not sure

hope this helps

have a good day :)

Step-by-step explanation:

​ simplify 2 × n × p × 4

Answers

Answer:

8np

Step-by-step explanation:

2 x 4 = 8

8 * n * p = 8np

a) If a/b=3/4, find: 6a+b/3a+2b​

Answers

Answer:

22/17

Step-by-step explanation:

If a/b = 3/4, then a = 3 and b = 4.

6a + b/3a + 2b

Substitute the variables.

6(3) + 4/3(3) + 2(4)

Multiply 6 and 3, 3 and 3, and 2 and 4.

18 + 4/9 + 8

Add 18 and 4, 9 and 8.

22/17.

PLS ANSWER I WILL MAKE YOU BRAINLIEST


A surveyor is standing 118 feet from the base of the Washington Monument. The surveyor measures the angle of elevation from the ground to the top of the monument to be 78°.
Find the height h of the Washington Monument to the nearest foot.

Answers

Answer:

555.1 ft

Step-by-step explanation:

if 100 students surveyed, 25 said they would vote for Jen for class president. If 2,000 students voted in the school's election, about how many votes should Jen receive?

A 25
B 100
C 500
D 1,900​

Answers

Answer:

500 Votes

Step-by-step explanation:

25/100 = 0.25

500/2000 = 0.25

Therefore 500 students would vote for Jen.

C.

The reason is because only a quarter of 100 said they'd vote which is found by doing 25/100 = 1/4 or 25% or .25 (all mean the same)

Apply that to 2000 by doing 2000 x 1/4 (or .25) and it should be 2000 x 1/4 = 500

The first step when dividing 9m2 − 4m − 6 by 3m is shown. Which could be the next step? 3m − − 3m − − 3m − − 3m − −

Answers

Given:

Consider the below picture attached with this question.

The given expression is:

[tex]\dfrac{9m^2}{3m}-\dfrac{4m}{3m}-\dfrac{6}{3m}[/tex]

To find:

The next step.

Solution:

We have,

[tex]\dfrac{9m^2}{3m}-\dfrac{4m}{3m}-\dfrac{6}{3m}[/tex]

Cancel out the common factors.

[tex]=3m-\dfrac{4}{3}-\dfrac{2}{m}[/tex]

Therefore, the correct option is D.

Can someone pleaseeee help and if you’re correct i’ll give brainliest

Answers

Answer:

Rows: 3+3+3+3=12

Columns: 4+4+4=12

N = 16 - (3 + 2) I dont know what this is.

Answers

Answer:N=11

Step-by-step explanation: 16-5 is 11, and that is equal to N

Keisha's teacher gives her the following information:
• m, n, p, and q are all integers and p = 0 and q +0
• A= and B=;
What conclusion can Keisha make?

Answers

i think it is b sorry if i am wrong

Answer: b

Step-by-step explanation: b

What is the inverse of f(x)=3x^2

Answers

Answer:

f^-1 (x)=sqrt(x/3), -sqrt(x/3).

Step-by-step explanation:

f(x)=3x^2

y=3x^2

x=3y^2

y^2=x/3

y=sqrt(x/3), -sqrt(x/3).

Answer:

[tex]y=3x^2[/tex]

[tex]y=3x^2[/tex]

Step-by-step explanation:

There is no step-by-step explanation because it's a graph. Well, it's how I did it. Therefore, the graph in the picture that I'm about to post will be your answer.

does the point (4,-2) lie on the circle with a center at (4,0) and a radius of 2?

Answers

Answer:

Yes

Step-by-step explanation:

It lies on the circle because the radius is 2 and the point goes down two units just like the radius

Answer:

yes

Step-by-step explanation:

the radius extends out 2 points throughout the entire circle therefore -2 will be reached as it is 2 units below the center of (4, 0)

Willl give brainlyist if quick its timedd

Answers

Answer:

feel like its C

Step-by-step explanation:

Si un rombo tiene un lado con medida de 16 pulgadas. Cual es su perimetro . If a rhombus has a side measured 16 inches. What is its perimeter.

Answers

Answer:

64 inches or 64 pulgadas

Step-by-step explanation:

The formula for the perimeter of a rhombus is given as:

P = 4a

Where a = side length of the rhombus

From the above question, side length of the rhombus = 16 inches

Hence, Perimeter of the rhombus = 4 × 16 inches

= 64 inches

La fórmula para el perímetro de un rombo se da como:

P = 4a

Donde a = longitud del lado del rombo

De la pregunta anterior, la longitud del lado del rombo = 16 pulgadas

Por lo tanto, perímetro del rombo = 4 × 16 pulgadas

= 64 pulgadas

Which expression is equivalent to 4(3n -5)?

Answers

Answer:

12n-20

hope this helps

have a good day :)

Step-by-step explanation:

Answer:

sorry i dont know the answer

Step-by-step explanation:

simplify………………………. look at the picture for the question thanks

Answers

Answer:

C) 2y^6/x^8

Step-by-step explanation:

Mathtype won't work on here, sorry.

Hope this helped! :)

whats 8 over x-2 =24 over 7 in solving proportions NO LINKS

Answers

Answer:

[tex]x=\frac{1}{3}[/tex]

Step-by-step explanation:

[tex]\frac{8}{x-2} =\frac{24}{7}[/tex]

[tex]x=\frac{1}{3}[/tex]

does anyone mind helping me with this please?

Answers

Area of a trapezoid = (a+b) x h/2
A = (GF + DE) x 4 /2
A = (4 + 8) x4/2
Area = 24

Please help me with this question

Answers

Answer:

B) 61° + 24° =

Step-by-step explanation:

What is this? 10 points !

Answers

Answer:

x= 114

Step-by-step explanation:

correspnding angles are equal.

I hope im right! :)

answer: 114
the corresponding angles are equal.

calculate the difference between the two times.
8: 15 am. or pm

3: 30 am or pm.

Answers

Answer:

5:15 pm is the answer for the question

What is the measure of Angles are not necessarily drawn to scale,
A
B
С
73
x O

Answers

Answer:

17°

Step-by-step explanation:

m∠x=90-73=17° (∠AOC is right angle)

Fiona deposited $900 in the bank over 2 years. She earned $60 in
simple interest at the end of the 2 years. What was the annual
interest rate?

Answers

If Fiona deposited $900 in the bank over 2 years. She earned $60 in

simple interest at the end of the 2 years then 3.33% is the annual

interest rate.

What is Percentage?

percentage, a relative value indicating hundredth parts of any quantity.

Given that Fiona deposited $900 in the bank over 2 years.

She earned $60 in simple interest at the end of the 2 years.

We have to find the annual interest rate

I=PRT

60=900×2×T

60=1800T

Divide both sides by 1800

T=3.33%

Hence,  the annual interest rate is 3.33%

To learn more on Percentage click:

https://brainly.com/question/28269290

#SPJ1

Find the volume of triangular prism. NO LINKS

Answers

Answer:

504

Step-by-step explanation:

PLEASE HELP....ITS DUE TOMORROW !!!!
​

Answers

Answer:

Aired

Step-by-step explanation:

IN DESPERATE NEED OF HELP!!!! TIMED TEST!!! WILL GIVE BRAINLYEST!! No links or I will report u

Answers

Answer:

a) Slope is -4/3 y-intercept is 2

b) Slope is 2 y-intercept is -1

Step-by-step explanation:

y=mx+c

m=gradient (or in this case slope)

c=y-intercept

what is the CORRECT answer?

Answers

Answer:

bro use the dang fromula

Step-by-step explanation:

L*W=A divided by 2

ILL MARK BRAINIEST IF YOU DO ONLY NUMBER 8 DO NOT DO 7!!!!

Answers

Answer and Step-by-step explanation:

8. We want to solve for a of the trapezoid area formula.

A = [tex]\frac{h}{2} (a + b)[/tex]

First off, we need to multiply both sides by [tex]\frac{2}{h}[/tex] to cancel out the [tex]\frac{h}{2}[/tex].

[tex]\frac{2A}{h}[/tex] = a + b

Now, we need to subtract b from both sides.

[tex]\frac{2A - b}{h}[/tex] = a

We get the answer to be:

I. a = [tex]\frac{2A - b}{h}[/tex]

#teamtrees #PAW (Plant And Water)

Factorise fully
-X – 10

Pls help

Answers

Answer:

-X – 10=-1(x+10) is your answer

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