Question

Which expression is equivalent to (4x + 7y) + 5z? A) 4x + (7y + 5z) B) 4x(7y + 5z) C) 11xy + 5z D) 16xyz

Answer 1

answer is A) 4x + (7y + 5z) ....switching grouping....result will be the same.

Answer 2

Answer: (A) 4x+(7y+5z).

Explanation: The given expression is (4x+7y)+5z.

For the set of real numbers, we have the following associative property-

If a, b and c are any three real numbers, then
`(a+b)+c=a+(b+c)`

Applying this associative property of real numbers, we can write

`(4x+7y)+5z=4x+(7y+5z)`

So, options (B), (C) and (D) are incorrect.

Thus, the correct option is (A).