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4 years ago

Write a number sentence to represent the model. Explain how you determined the number sentence.

Mathematics

1 answer:

vampirchik [111]4 years ago

4 0

90 % sure

The image attached shows an operation that can be represented with whole numbers, becuase there are positive and negative characters.

So, we know by given that there are +4 circles and -7 circles, and the whole can be expressed as the algebraic sum of them,

Therefore, the model can be represented by the number -3, which is the whole because is the result of the operation that represent each type of element.

hope i helped

-lvr

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By calculator: it's 2.378

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Step-by-step explanation:

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4 years ago

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Step-by-step explanation:

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3 years ago

A man invested one fifth of his money at 4%, half of his money at 5%, and the rest of his money at 3.5%. If his total annual inv

Ksivusya [100]

The man invested 1/5 of the money at 4/100. Which says he earns 4/500 of his total money on one month.

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For the last part, he spent the rest of the money which is: x + 1/5 + 1/2 = 1
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He gave this money for 3.5/100 interest. Which equals 10.5/1000 of his total money.

When you add the three values: 4/500 + 5/200 + 10.5/1000
Make denominators equal: 8/1000 + 25/1000 + 10.5/1000
Add the like terms: 43.5/1000

This means the man's money's 43.5/1000 is equal to $870

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Make the denominators equal: 43.5x/1000 = 870,000/1000
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4 years ago

Can anyone check this after me ? did i do it right

____ [38]

Answer:

Yes, it is right. 

Using pythagoras theorum, we found the side to be 10. 

So, the perimeter is 4 times 10, i.e., 40

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4 years ago