MATHEMATICS HIGH SCHOOL

The sum of the age of two sisters is 20 years. If the one of them is 4 years younger than other , find their age.​

Answers

Answer 1
Answer:

Hello!

Answer:

\Large \boxed{\sf 12yo~ and ~8yo}

Step-by-step explanation:

→ We want to find the age of each sister.

→ Let the age of the elder sister be x years.

→ So we know that:

  • The age of the elder sister = x
  • The age of the the youngest sister = x - 4
  • The sum of the age of two sisters = 20

→ So we have this equation:

\sf x + x-4=20

→ Let's solve the equation to find the age of the sisters:

◼ Simplify the left side:

\sf 2x-4=20

◼ Add 4 to both sides:

\sf 2x-4+4=20+4

◼ Simplify both sides:

\sf 2x=24

◼ Divide both sides by 2:

\sf (2x)/(2) =(24)/(2)

◼ Simplify both sides:

\boxed{\sf x = 12 }

→ So now, we know that:

  • The age of the elder sister = 12
  • The age of the the youngest sister = 12 - 4 = 8

Check:

"The sum of the age of two sisters is 20":

\sf 12 + 8 = 20

✔ So the check is good.

Conclusion:

The elder sister has 12 years old and the youngest sister has 8 years old.
Answer 2
Answer:

Answer:
Older sister:12 years old

Youger sister:8 years old


Step-by-step explanation:

I will be using the model method (boxes)as it will show a clearer view of the question.

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Answers

Question 1 is correct. AM = 4 and CM cong. AM therefore CM = 4.
Question 2 is correct. Triangles congruent by SAS --> BA cong BC = 12
Question 3 Line BM intersects point D
Questions 4-6 Attachement 1 is an example with these triangles and their circumcenters as det. by their perp. bisectors. As you can see:
The POC of a right triangle lies on the triangle, acute, inside, and obtuse, outside.
Question 7-8 First off: DF = 6, not BD.
We can clearly see 6 congruent triangles within this equilateral one.
BD corresponds to AD and = 11.5
So does DC.
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cus im tryin to help u but u got it all right to me kill

The length of a rectangle it twice it's within. If the perimeter of the rectangle is 30 cm, find its area.

Answers

w - width

2w - length (l)

30 cm - perimeter

w + w + 2w + 2w = 6w - perimeter

The equation:

6w = 30    divide both sides by 6

w = 5 cm

2w = 2(5) = 10

l = 10 cm

The area of a rectangle: A = lw.

Substitute:

A = (5)(10) = 50

Answer: The area is 50cm²

These cuboids are made from small cubes. Write how many small cubes there are in each cuboid

Answers

The number of small cubes in each cuboid is:

(a) 3, b) 6, c) 27, and d) 16.

Given are four cuboids.

It is required to find the number of small cubes that are used to make these cuboids.

a) There are only 3 small cubes.

b) There is only one step of cubes.

Number of cubes = 3 + 3 = 6

c) There are 3 cubes arranged horizontally and 3 cubes arranged vertically through each surface.

Number of cubes in one step = 3 × 3 = 9

There are 3 steps like that.

So, total number of cubes = 3 × 9 = 27

d) There are 4 cubes in the horizontal position.

And there are 4 cubes going down.

Total number of cubes = 4 × 4 = 16

Learn more about Cuboids here :

brainly.com/question/29568631

#SPJ2

Answer:

a) 3 cubes

b) 6 cubes

c) 15 cubes

d) 16 cubes

The value of the 2in 204.75 is how many times the value of the 2 in 103.52

Answers

Answer:

10000

Step-by-step explanation:

Given : Number :204.75

            Number :103.52

To Find:The value of the 2 in 204.75 is how many times the value of the 2 in 103.52?

Solution:

Number :204.75

Value of 2 is 200

Number :103.52

Value of 2 = (2)/(100)=0.02

So, 10000 * 0.02 = 200

Thus 10000 times of 0.02 is 200.

So, the value of the 2 in 204.75 is 10000 times the value of the 2 in 103.52.
I made it into an equation and took out all the other numbers so the equation would be 000.02x=200 and your trying to find x so you divide 200 by 000.02 equals 10000 and if you put it back in the equation 000.02(10000)=200 it comes out 200 so the answer is 10000

Give away say thank you
first gets the brain

Answers

Answer: THANK U (:

Step-by-step explanation:

Answer:

thanks? srry im a lil late

Step-by-step explanation:

Help me with math ( 9th grade)

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Theres a website called spades (or something like that) if you go on it look for your math text book and it will have the answers for you
the answer is the second option.
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