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Ray Of Light [21]
3 years ago
9

Please help me or i will fail

Mathematics
1 answer:
dusya [7]3 years ago
4 0
Find area of square: 7^2 = 49

Find radius of circle: 7/2=3.5

find area of circle: 3.5^2*3.14=38.465

Remove area of circle from area of square:
49-38.465=10.535 cm^2

Answer A is the correct one :)
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Find the domain of: y = 3x + 1
Vedmedyk [2.9K]

y = 3x + 1

It's a linear function. The domain of linear function is the set of all real numbers.

D=\mathbb{R}=(-\infty,\ \infty)

6 0
4 years ago
Three merchants find a purse lying in the road. The first asserts that the discovery would make him twice as wealthy as the othe
Angelina_Jolie [31]

Answer: the system of equation would be :

  • A + Y = 2 (B+C)  
  • B + Y = 3B
  • C + Y = 5C

the three merchants would have 10 dollars, 10 dollars, and 5 dollars respectively

Step-by-step explanation:

before finding the purse, lets assume the wealth of the 3 merchants were as follows:

first merchant = A  dollars

second merchant = B dollars

third merchant = C dollars

  1. lets assume the purse contained Y dollars

After finding the purse they all claimed they would have the following:

first merchant said adding the money in the purse to his wealth would make him twice as rich as the other two combined : A + Y = 2 (B+C)  

second merchant said adding the money in the purse to his wealth would make his wealth triple  : B + Y = 3B

third merchant said adding the money in the purse to his wealth would make his wealth increase five folds : C + Y = 5C

third merchant = C dollars

therefore the system of equations to represent the problems are:

  • A + Y = 2 (B+C)  
  • B + Y = 3B
  • C + Y = 5C

2. now when the money in the purse is 20 dollars (Y= 20 dollars ), from the equations above

the second merchant will have :

B + Y = 3B  

 B + 20 = 3B

  3B - B = 20

  2B = 20

   B = 10 dollars

the third merchant will have :

C + Y = 5C

C + 20 = 5C

5C - C = 20

4C = 20

C = 5 dollars

the first merchant will have :

A + Y = 2 (B+C)  

A + 20 = 2 ( 10 + 5)

A = 2 (15) - 20

A = 30 - 20

A = 10 dollars

8 0
4 years ago
If 124 is subtracted from the square of a number the result is 200 what is the number​
omeli [17]

Answer:

Step-by-step explanation:

let the number =x

then

x²-124=200

x²=200+124

x²=324

x=18

4 0
3 years ago
there are 25 painters an 80% of them are painting the interior how many painters are painting the inside
Zepler [3.9K]

Answer:

20 painters are painting the inside

Step-by-step explanation:

8 0
3 years ago
A={b,l,o,u,s,e} and U={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}.
guapka [62]

Answer:

????????????????????????????????????????

4 0
3 years ago
Read 2 more answers
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