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allsm [11]
3 years ago
7

at a school Fair 70% of the people are under 16 years old one third of the people remaining are teachers if there are 21 teacher

s at the fair how many people are there at the fair total
Mathematics
1 answer:
PolarNik [594]3 years ago
6 0
Hello! One-third of the remaining people are teachers and there are 21 of them. Percents are parts of 100, and 100 - 70 is 30. 1/3 of of that 30% are teachers, and 10 is 1/3 of 30. 10% of those at the fair are teachers and there are 21 of them. As we see, 10% is 1/10 of 100. For this, all we need to do now is multiply 21 and 10. 21 * 10 is 210. There. A total of 210 people are at the fair.
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3 years ago
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If Charles lost 20 pounds, he would weigh seven times as much as his dog. Together they weigh 200 pounds. How much does each wei
barxatty [35]

Answer: Weight of Charles = 177.5 pounds

Weight of dos = 22.5 pounds.

Step-by-step explanation:

Let x = Weight of Charles

y = Weight of dog.

As per given , we have the following system of linear equation :

x+y=200--------(i)\\\\x-20=7y-----------(ii)

We can write (ii) as :

x-7y=20---(iii)

Subtract equation (iii) from (i) , we get

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6 0
3 years ago
Is a perpendicular bisector of .
77julia77 [94]

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  • cuts the line segment RT into two equal pieces or bisects it;
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Consider an arbitrary point X on the line RT that differs from S. Connect  points U, V and X to form triangle UVX. Line XS will be the height and the median of the triangle UVX. This gives you that triangle UVX will be isosceles triangle with base UV.

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3 years ago
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koban [17]

Answer:

c = 77.6

Step-by-step explanation:

You may have entered the measure of a side as the measure of an angle.

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c\sin 75^\circ = 150 \sin 30^\circ

c = \dfrac{150 \sin 30^\circ}{\sin 75^\circ}

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You are correct. Good job!

5 0
3 years ago
How is 0.009 and 0.09 related?
sweet-ann [11.9K]
<span>
0.009 is 1/10th of 0.09 which also mean that 0.09 is 10 times as big as 0.009
 </span>
4 0
3 years ago
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