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
Answer:
B & D
Step-by-step explanation:
B & D
I believe it is option choice A, because that is the most reasonable and efficient
For this case we must simplify the following expression:
We have that by definition of properties of powers that is fulfilled:

Then, rewriting the expression:

ANswer:
Option D