Respuesta :

Poltergeist

Answer:

D. Not valid.

Explanation:

Two quantities spanning different units can only be multiplied and divided, but cannot be added. The reason for this is that addition or subtraction is scaling the quantities: You can subtract 2 oranges from 10 oranges, but you cannot subtract 2 apples from 10 oranges.

Similarity, adding meters to kilograms is not a valid operation, because such an operation does not have any meaningful physical interpretation (subtracting oranges from oranges we can understand, but subtracting apples from oranges we cannot. )

kudzordzifrancis

Answer:

D) Not valid

Explanation:

This is the expression to be simplified.

5m + 2kg

We can see that 5m, which is quantifying a distance. And the unit of distance is metres.

Also 2kg,which is quantifying a mass of a body.

The unit of mass is kilograms.

Since metres and kilograms are unlike it is impossible to work the expression out by addition.