Answer:
15
Step-by-step explanation:
3x - 2y = ?
3(7) - 2(3) = ?
21 - 6 = ?
= 15
All you have to do is substitute the given values & follow the order of operations! Best of luck.
Answer:
the atoms can have different numbers of valence electrons
(2,-1) The intersecting point is the point where the two lines meet.
Answer:
With what? I don't see the question.....
Answer:

Step-by-step explanation:
The given expression is,

We apply the laws of indices to rewrite as a positive index to get,

We substitute

to obtain,

This simplifies to,
