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hram777 [196]
3 years ago
12

The price of a watch was increased by 20% to £144. What was the price before the increase?

Mathematics
1 answer:
Zinaida [17]3 years ago
6 0

Answer:

120 pounds

Step-by-step explanation:

Since the new cost is 144 pounds and this is 20% more,  this is 120% of the original price. Remember 100+20 = 120. To find the original price set up a proportion with these values:

\frac{144}{x}=\frac{120}{100}

Solve for the original price by cross multiplying numerator with denominator.

x(120) = 144(100)

120x = 14400

x= 120 pounds



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Answer:

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x=18/2

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x+7=16 girls

 

If you don't understand variables use trial and error.

 

Boys     Girls

1           8

2           9

3           10

4           11

5           12

6           13

7           14

8           15

9           16   9+16=25 students

 

You could start this way...

 

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3 years ago
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3 years ago
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Now consider triangles AOD and BCD:
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5 0
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Question 4 options:
Arada [10]

Answer:

{ b, d, f }

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= { b, d, f }

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3 years ago
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