3 years ago

This is hey confusing because I didn't go to school when they gave a lesson about this so please help.

Mathematics

1 answer:

alex41 [277]3 years ago

8 0

I think that this is just showing how you can make different percentages by multiplying/dividing by specific numbers.

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Answer:

20%

Step-by-step explanation:

Subtract the original number from the new number: 90-75=15

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Now divide the increase by the original number: 15/75=.20

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3 years ago

What is the length of AB?

Xelga [282]

Answer:

Step-by-step explanation:

From the attachment,

In ΔDEF,

DF = GH-(GD+FH) = 6 - (2+3) = 1 cm

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Applying Pythagoras theorem,

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DI = GH-(GD+IH) = 6 - (2+1.5) = 2.5 cm

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Applying Pythagoras theorem,

$CI=\sqrt{CD^2-DI^2}=\sqrt{3.5^2-2.5^2}=\sqrt6$

AB = EF + CI = $2\sqrt6+\sqrt6=3\sqrt6=7.35\ cm$

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3 years ago

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Step-by-step explanation:

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2 years ago

How do you do this problem?

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