
<h2>
Explanation:</h2>
The commutative property of addition states that:

So applying this property to our expression we have:

<h2>Learn more:</h2>
Evaluating expression: brainly.com/question/14423698#
#LearnWithBrainly
I'm not exactly sure what you're asking but in total there's 800 kids at East Side Elementary School.
x+y=10
x+2y=14
x is common in both so u have to subtract the second one from 1st
x-x + y-2y = 10-14
-y = -4
y=4
which means bottle of water (y) = 4
and then substitute 4 in equation (x+y=10 or x+2y=10)
x + 4 = 10
x=6
If you cards are only 5,6,7, then the probability of getting even, then even would be zero.
The directions say that the card is not replaced. Therefore, once you pick the 6, there would be no more even cards.