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pychu [463]
2 years ago
12

PLease help me in this work!!!

Mathematics
2 answers:
Zinaida [17]2 years ago
8 0

Answer:

the first one is the expression

Sveta_85 [38]2 years ago
6 0
The second one
x-3x+4
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If 12 children represents 12.5% of the people attending a concert, how many people are attending the concert
NeTakaya

96 people are attending the concert.

Step-by-step explanation:

Given,

Number of children at concert = 12

This represents 12.5% of the people attending concert.

Let,

p be the total people attending concert.

12.5% of p = 12

\frac{12.5}{100}*p=12\\0.125p=12

Dividing both sides by 0.125

\frac{0.125p}{0.125}=\frac{12}{0.125}\\p=96

96 people are attending the concert.

Keywords: percentage, division

Learn more about division at:

  • brainly.com/question/317601
  • brainly.com/question/306772

#LearnwithBrainly

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scientist A dissolved 1 kg of salt in 3 litres.

scientist B dissolved 20 pounds of slat in 7 pint of water.

we know that 1 pound =0.543 g

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so dissoving 1 kg of salt in 3 litres of water and 9.07 kg in 3.5 litres of water

we know that for concentration kg/l units is used .

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and B=9.07/3.5=2.59 kg/l.

so scientist A has prepared more concentrated solution .

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Hope this helps you out.

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A problem states. "There are 7 more girls than boys in a club
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x + 7= the number total number of girls in the club.

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