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3 years ago

Which expression is the sun of cubes?

Mathematics

1 answer:

Nina [5.8K]3 years ago

7 0

Answer:

Step-by-step explanation: We have been given 4 expressions. We are asked to choose the expression that represents sum of cubes.

We know that sum of cubes is in form .

We can see that 1st and 2nd option has a negative sign. Therefore, these options cannot be sum of cubes.

Let us check 3rd and 4th options one by one.

We can rewrite our expression by writing terms as cubes:

Therefore, expression is a sum of cubes.

In 4th expression, we can see that . We cannot represent it as a cube. Similarly, we cannot represent as a cube. Therefore, 4th expression is not correct.

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3 years ago

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3 years ago

Use long division to determine the decimal equivalent of 5 over 9. 0 point 3 bar 0 point 4 bar 0 point 5 bar 0 point 6 bar

LenaWriter [7]

Answer:

Option 3 - 0 point 5.

Step-by-step explanation:

Given : Decimal equivalent of 5 over 9.

To find : Use long division to determine the decimal?

Solution :

We have to divide 5 by 9,

Step 1 - Divide 5 by 9 as it is not divisible put a decimal and 0 after 5,

Step 2 - Now, divide 50 by 9 the quotient is 5 and remainder is 5.

Step 3 - Again put 0 and divide the number repeat the process until the remainder is not zero.

We have done the calculation up to 3-decimal place.

So, $\frac{5}{9}=0.555$

Approximately, $\frac{5}{9}=0.5$

So, Option 3 is correct.

Refer the attached figure for calculation.

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