IF YOUR ANSWER RIGHT I'LL GIVE YOU BRAINLIES Evaluate the expression when y = 4.
5 + y + 8
A. 13
B. 17
C. 21
D. 72

I’m not quite sure don’t get me wrong with this. But I believe the answer would be B) 17.

Explanation: Basically, “y” is considered a variable. As we now know y=4 so this makes it a full expression 5 + 4 + 8 remember and expression has no product/ answer along with it! Also when a number and a variable are put together it’s multiplication so it would look like this (5y) so it would be 5 times y but the thing is that it’s clear we have addition so don’t get confused with that! As you may know 5 + 4= 9 and 9 + 8 = 17 or the other way around 8 + 4 = 12 and 12 + 5= 17 so that will be the correct answer! Have a wonderful day! :) I really hope this has helped. But here’s an example:

Aand b are correctly balanced reactions. they have the same number of atoms in both sides of the reaction