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4 years ago

I need to know this plz and thank u

Mathematics

2 answers:

Nat2105 [25]4 years ago

8 0

The third option is correct. Hope this helps!

mr_godi [17]4 years ago

3 0

The third one :) I hope I did it right

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The mean of the data set(9,5,y,2,x)is twice the data set (8,x, 4,1,3).What is (y-x)

pantera1 [17]

Answer:

y - x = 16

Step-by-step explanation:

Explanation:-

Step(i):-

Given data set A is 9,5,y,2,x

Mean of the Data set A

= $\frac{9 + 5 + y + 2 +x}{5}$

= $\frac{16 +x+y}{5}$

Given data set B is 8, x, 4, 1, 3

Mean of the Data set B

= $\frac{8+ x+4+1+3}{5}$

Step(ii):-

Mean of the Data set A = 2 X Mean of the Data set B

$\frac{16 +x+y}{5} = 2 X \frac{16+x}{5}$

On simplification , we get

16 +x + y = 2( 16 +x)

16 + x + y = 32 + 2 x

16 + x + y - 32 - 2 x = 0

y - x -16 =0

y - x = 16

5 0

3 years ago

12% of the books in the public library are mathematic books if there are 90,000 books in the library find the number of mathemat

Sergio039 [100]

12/100 = x / 90000, x = 12*90000/100 = 10800 mathematics book

8 0

4 years ago

Determine if true: 10x3-20=20

nexus9112 [7]

Answer:

False

Step-by-step explanation:

10x3=30

30-20=10

10=20

These equations dont match.

Hence, the equation is false

4 0

3 years ago

Read 2 more answers

Natalie added 20 pieces of candy to a bowl. Two days later, half of the candy in the bowl is gone. If there are 14 pieces left i

Salsk061 [2.6K]

Answer:

8 pieces of candy

Step-by-step explanation:

Take the original amount of candy in the bowl to be $x$ .

It says that 20 pieces of candy were added, therefore there are $x+20$ pieces of candy in the bowl.

Half of the candy is gone, therefore $\frac{x+20}{2}$ pieces of candy are left in the bowl.

After half of the candy is gone, there are 14 pieces left, so we can say that $\frac{x+20}{2} =14$

Solve for $x$ :

$x+20 = 28$

$x=8$

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3 years ago

Out of 28 teenagers and adults, people, 12 adults attended a music concert. what is the ratio of teenagers to attendees?

Naddika [18.5K]

Answer:

I believe it would be 14 to 28

5 0

2 years ago