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Anni [7]
3 years ago
10

If 20% of 40% of a number is 10 greater than half the number what is the number

Mathematics
2 answers:
nadezda [96]3 years ago
5 0

Let the number is x

Now going with the statement of the question

20% of 40% of x is 10 greater than half of x

So

\frac{20}{100} (\frac{40}{100} (x)) = \frac{x}{2}+10

\frac{800}{10000} *x = \frac{x}{2} +10

\frac{8}{100} x = \frac{x}{2} +10

Subtract \frac{x}{2} from both sides

\frac{8}{100} x - \frac{x}{2} =10

\frac{8x}{100}  - \frac{50x}{100} =10

\frac{-42x}{100}=10

Multiply 100 on both sides

-42x = 1000

Divide both sides by -42

x=\frac{-500}{21}

lord [1]3 years ago
4 0
Is the question multiple choice?
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3 years ago
To determine how a city’s residents feel about building a new youth center, a group considers surveying 50 random children at a
Lemur [1.5K]
This would result in a biased sample because:

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most of those kids are more likely than not to want a youth center, so most of them will naturally agree without a doubt for the need of a youth center

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please vote my answer brainliest. thanks!



5 0
3 years ago
Read 2 more answers
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Dmitrij [34]

Answer:

F,D. C,D

Step-by-step explanation:

This is all I know the F and D make a right angle and the C,D make a 360 degree angle.

4 0
3 years ago
Megan and Suzanne each have a plant. They track the growth of their plants for four weeks. Whose plant grew at a faster rate, an
CaHeK987 [17]
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4 0
2 years ago
Read 2 more answers
Please help me figure this out
Gnom [1K]

Answer:

True          

(1) You can prove two triangles are similar using AA similarity.

(2)If side length of similar figure have ration \frac{m}{n} then the ratio of surface areas will be:\frac{m^2}{n^2}

(3)If side length of similar figure have ratio of \frac{2}{3} then perimeter will have ratio:\frac{2}{3}.

False:

(1)If side length of similar figure have ration \frac{m}{n} then the ratio of Volumes will be:\frac{m^3}{n^3}

(2)If side length of similar figure have ration \frac{m}{n} then the ratio of surface area  will be:2\frac{m}{n}

4 0
3 years ago
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