Mathematics Middle School

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family? (This is actually math)

Answers

Answer 1

Answer:

their are 4 sisters and 3 bothers

Related Questions

What is the exposed surface area of the park bench above?


98
118
108
124

Answers

I think the answer is 108

Need some help here please

Answers

I think the d is the right answer

Please help me thank you! <3!
I really need help :/
I WILL GIVE BRAINLIEST
question:
1. Use the Pythagorean theorem to find AD.
2. Find AC. Show your work.
3. Is ΔABC a right triangle? Explain.
SHOW YOUR WORK

Answers

Problem 1

Answer: AD = 9

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

Work Shown:

Focus on triangle ADB, which is the smaller triangle on the left.

We have these side lengths

AD = unknown leg

BD = 12 = known leg

AB = 15 = known hypotenuse

Let's apply the Pythagorean Theorem to find the unknown leg

a^2 + b^2 = c^2

(AD)^2 + (BD)^2 = (AB)^2

(AD)^2 + (12)^2 = (15)^2

(AD)^2 + 144 = 225

(AD)^2 = 225-144

(AD)^2 = 81

AD = sqrt(81)

AD = 9

Side AD is 9 units long.

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

Problem 2

Answer: AC = 25

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

Work Shown:

AC = AD + DC .... segment addition postulate

AC = 9 + 16 ..... substitution; refer to problem 1

AC = 25

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

Problem 3

Answer: Triangle ABC is a right triangle.

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

Work Shown:

The Pythagorean Theorem Converse says "if a^2+b^2 = c^2 is a true equation, then the triangle with sides a,b,c is a right triangle". Keep in mind that c is always the longest side (hypotenuse). The order of 'a' and b doesn't matter. Convention has us usually do [tex]a \le b[/tex] but again the order isn't important.

We have these three sides

a = 15 (length of side AB; leg #1)b = 20 (length of BC; leg #2)c = 25 (length of AC; hypotenuse)

Plug those values into the equation below. Simplify each side.

a^2+b^2 = c^2

15^2 + 20^2 = 25^2

225 + 400 = 625

625 = 625

We get a true equation. Therefore, triangle ABC is a right triangle.

Answer:

Step-by-step explanation:

Pythagorean = c^2 =a^2 + b^2

we are given c and a   so solve for b

c^-a^2 = b^2

15^2- 12^ = b^2

81= b^2

[tex]\sqrt{81}[/tex]=b

9=b

AD=b

AC = AD + 16

AC =9 + 16 =25

if it's a right triangle then Pythagorean will work with the sides to make 25

AC^2 = 15^2+20^2

AC = [tex]\sqrt{625}[/tex]

AC = 25

Elena has 80 trading cards in her collection. If 15%
of her cards are baseball cards, how many of Elena’s trading cards are baseball cards?




3
4
⁢
of the rabbit cages. He will clean the rest of the rabbit cages on Friday. Which equation shows the total number of rabbit cages that will be cleaned on Friday?

Answers

The answer for the first one is 12. 15% of 80 is 12. The second one I can’t answer because it is not very clear and is cut off

write the equation in slope-intercept form of the following table

Answers

3 (6 is the answer 4*5

Answer:

Step-by-step explanation:

Take any two points and find the slope.

(3,7) ; (9,5)

Slope =[tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\\[/tex]

         [tex]=\frac{5-7}{9-3}\\\\=\frac{-2}{6}\\\\=\frac{-1}{3}[/tex]

Equation: y -y1 = m(x -x1)

[tex]y - 7 = \frac{-1}{3}(x - 3)\\\\y -7 =\frac{-1}{3}x -3*\frac{-1}{3}\\\\y -7=\frac{-1}{3}x+1\\\\y = \frac{-1}{3}x+1+7\\\\y=\frac{-1}{3}x+8[/tex]

Simplify 6(x + y) + (x - y).

6x
7x
7x + 6y
7x + 5y

Answers

Answer:

If these are the answers then the last one should be right

Step-by-step explanation:

prove me wrong

Answer: 7x + 6y

Step-by-step explanation:

i think this is right

Mr. Sonny's science class is calculating the average number of blinks per minute. Jan blinks 126 times in 7 minutes. What is her blinking rate, in blinks per minute?

Answers

18 blinks per min since 126 divided by 7 equals 18
Answer:
b. Every 24 minutes
Step-by-step explanation:
A neon sign blinks every 6 minutes, and another sign blinks every 8 minutes.
The first step is to:
Find and list multiples of each time each neon sign blinks.
This means, we find the Multiples of 6 and 8
Multiples of 6:
6, 12, 18, 24, 30, 36
Multiples of 8:
8, 16, 24, 32, 40
The first and common multiple of 6 and 8.
Therefore, the Least common multiple [LCM(6, 8) ] = 24
Hence, they often blink at the same time every 24 minutes.
Therefore, option b.Every 24 minutes is correct.

A group of 80 students was asked to share how they get to school most of the time. The following circle graph represents their answers to the question. How many of the students walk to school most days?

0
24
20
25

Answers

It is 24 because of the days

Sean bought his house at $200,000 two years ago. He is now
selling it for $267,000. What is the percent markup?

A) 2% increase
B) 25.1% increase
C) 33.5% increase
D) 67% increase

Answers

Answer: 33.5%

Step-by-step explanation:

common sense

Select all that apply.

Green pencils are priced at $1.28 for 4. Blue pencils are priced at $5.52 for 24. Which of the following statements are true?

The unit rate for green pencils is $0.32
The unit rate for blue pencils is $0.28
The green pencils are priced less per pencil
The blue pencils are priced less per pencil.

need an expert verified answer

Answers

Answer:

The first and third is correct.

Step-by-step explanation:

I'm not a expert but I know its right.

Answer: unit rate for green pencils is $0.32 and the blue pencils are priced less per pencil

Kristi had $3,250 in her bank account. Currently, she has $2,730 in her account. What is the approximate percent of decrease in her account?

i will give brainliest :)

Answers

The answer is a 16% decrease. I know this will help you :D
16% :) because 3,250-16%=2730

A zebra runs 20 meters in 4 seconds. At this rate, how many meters does the zebra run in 60 seconds?

A.
300

B.
240

C.
120

D.
80

Answers

The answer is A which is 300.
The answer is 300, answer A

What is the final price of an item that cost $14 with a 75% discount

Answers

Sale Price = $3.5 (answer). This means the cost of the item to you is $3.5. You will pay $3.5 for a item with original price of $14 when discounted 75%. In this example, if you buy an item at $14 with 75% discount, you will pay 14 - 10.5 = 3.5 dollars.
$3.50 because 14 - 75% or you should do convert 75% to a decimal .75 so u should do
14.00
- .75
———-
3.50

5 The smallest angle of a triangle, in degrees, is p.
The second angle is 4 times the smallest angle.
The third angle is 5 times the smallest angle.
a Write an equation for the angles in the triangle in terms of p.

b Find the size of the largest angle in the triangle.

b in paticular

Answers

Answer: b = 90

Step-by-step explanation:

Full triangle is 180

5 + 4 = 9 + 1 (the smallest angle)

180 ÷ 10 = 18

First and smallest angle is 18

p= 18

Second angle is 72

18 × 4 = 72

Thrid angle is 90

18 × 5 = 90

b = 90

18 + 72 = 90 + 90 = 180

Khan Academy PLEASE SOMEONE HELP FASTTT!!!!

Answers

angle a is 132 degrees

5x-18=3x+42
2x-18=42
2x=60
x=30

then plug 30 in the equation for angle a

5*30-18
150-18
132
132 degrees. hope you do good

Which expression is equivalent to 6w + 5 - 3w + 7

A. 9w + 2
B. 3w + 12
C. 11w - 4
D. 11w + 4

Hint: It's not A, or B​

Answers

Answer:

the answer is B

Step-by-step explanation:

6w + 5 - 3w + 7

i) collect like terms

= 6w - 3w + 5 + 7

= 3w + 5 + 7

ii) add the numbers

= 3 w + 5 + 7

= 3w + 12

ik it’s answered, but it’s b

6w+5-3w+7

6w - 3w = 3w

5 +7=12

this means 3w+12

William left a 20% tip on a $15.80 lunch bill. How much did he pay for lunch?

Answers

Answer:

$16 should be the answer

Step-by-step explanation:

Answer:

3.16

Step-by-step explanation:

2
Patty is playing a card game. There are
three blue cards in a deck of twelve cards.
Patty draws a card at random. Without
replacing it, she draws another card. What
is the probability that neither card is blue?

Answers

Answer:

1/4

Step-by-step explanation:

Answer. Probability 1/ neither cArd is blue

Please help me I will give you the brain thing with extra points, please help me. 1/5

Answers

The answer to your question is the letter B
The answer is b because it is

whats 1/4x1/4x1/4x1/4 please

Answers

Answer:

0.00390625

Step-by-step explanation:

If you use the calculator, you'll find the answer.

Answer:

The answer is [tex]\frac{1}{256}[/tex] or [tex]0.004[/tex]

Step-by-step explanation:

hope this helps :)

what is an example of a negative number and a non-example of a negative number? plz this is for homework

Answers

Answer:

-2, non negative is 2

Step-by-step explanation:

hope this helps and good luck on homework

Answer:

like -2 and 2

Step-by-step explanation:

What is the value for "m" that makes the equation true?

9 =[tex]\frac{3}{8}[/tex]m

m = ?

Answers

Hi I think the answer is 24 hope that’s right

Will Award Brainliest!!!

Answers

Answer: x = 13

Step-by-step explanation:

x + 2x - 1 = 38

3x = 39

x = 13

x + 2x - 1 = 36 the answer is 13

Please help me I will give you the brain thing with extra points, please help me. 3/5

Answers

I think it’s C, try that.

Answer:

C) (x, y)->(-x, -y)

Step-by-step explanation:

This is a reflection

So, this is hard for me ;(( But can you guys help me???

Answers

Answer:

this is too large

Step-by-step explanation:

I'll only ans for more points

Part 2#
Practice (need help with 1 2 and 3)

Answers

Answer:

1- 14

2- 24

3- 56

Step-by-step explanation:

its multiplied by 2 each time

Answer: 14, 24, 49

You just do as the attern tells you

Can someone help me on this question? Harry and Tim both made New Years resolutions. Harry made 5 more resolutions than Tim. Together they made 13 resolutions. How many resolutions did Harry make?

Answers

Answer:7 I think

Step-by-step explanation:

Lacy saves 45% of her paycheck. If Lacy's paycheck is $680, how much does she save?

Answers

$306? almost half of paycheck-close to %50

Answer:

306

Step-by-step explanation:

u havw to do the formula part whole = % & 100.

45 x 680 = 30600

30600 divide 100 = 306 :)

Need help with this please (I’ll give brainlist to the correct answer )

Answers

Answer:

Form: Standard form

Key parts: 2 is the slope/roc, x is the variable, and 1 is the y intercept/b term

Step-by-step explanation:

The answer is A standard form :)

I will give brainilist!

Answers

Answer: 1/3

Step-by-step explanation:

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