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3 years ago

Why is 210 divided by 30 the same as 21 tens divided by 3 tens

Mathematics

1 answer:

sveta [45]3 years ago

6 0

Answer:

It is by definition. 210 means 21 tens or 21 * 10. 30 means 3 tens or 3*10.

Since there is a ten on the top and bottom of the divisor 210/30 is also the same thing as 21/3. All of which is 7 and all of which is true by definition.

Step-by-step explanation:

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3 years ago

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2 years ago

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2 years ago

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3 years ago

Two friends, Alejandro and Mia, agreed to split the check at a restaurant. Alejandro ordered $12 worth of food and Mia ordered $

kvasek [131]

Cost of Alejandro's food = $12

Tip paid by Alejandro = 20% of his bill = 20% of 12 = 2.4

Cost of Mia's food = $18

Tip paid by Mia = 15% of his bill = 15% of 18 = 2.7

Total Tip Paid = 2.4+2.7 = 5.1

Total Check Amount = 12 + 18 = 30

Total tip paid by Alejandro and Mia is r% of the total check amount.

So, we need to determine what % of 30 is equal to 5.1%

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⇒ r% = 5.1 / 30

⇒ r% = 17%

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3 years ago