I'm reviewing simplifying expressions. I get all right except this one, unless my answer key is wrong.
How does
p + 3s - (2p - 4s) = 7s-p ??
I get it to 7s + p - 2p what am I missing?
:)
I'm reviewing simplifying expressions. I get all right except this one, unless my answer key is wrong.
How does
p + 3s - (2p - 4s) = 7s-p ??
I get it to 7s + p - 2p what am I missing?
:)
"A bargain is something you can't use at a price you can't resist."
Franklin Jones.
1st* HTML5 Tracer Software
1st Mac Compatible Tracer Software
1st Linux Compatible Tracer Software
*Dave at OptiVision has a web based tracer integration package that's awesome.
7s + p - 2p can be further simplified to 7s + (p - 2p) which equals 7s -p
RT
Harry, it's just practice at simplifying expressions.
Thanks RT, but Sorry, I don't get what happens to the -2.
How does p -2p = -p
:)
"A bargain is something you can't use at a price you can't resist."
Franklin Jones.
p is another way of saying 1p. So you have 1p - 2p (which is the same as saying 1p + -2p). In Algebra, when you have terms that have the same variable (p, in this case), you can just add up the numbers in front of the variable to simplify.
Let's say that "p" represented the number 4.
p = 4
-2p = -8
p - 2p = 4 -8 = -4
and... -4 = -p
This works for any number that you substitute for p.
RT
Thank you so much for clearing that up. I get it now.
:)
"A bargain is something you can't use at a price you can't resist."
Franklin Jones.
Ok, I get it. It was just an exercise. Well you have the answer now, but like terms can alwasy be subtracted and addeds to one another.
p + 2p = 3p
p2 + 2p2 = 3p2
p3 + 2p3 = 3p3
p + 2p2 = cannot be added together because the variable isn't alike.
This site is an awesome resource for math:
http://mathworld.wolfram.com/
1st* HTML5 Tracer Software
1st Mac Compatible Tracer Software
1st Linux Compatible Tracer Software
*Dave at OptiVision has a web based tracer integration package that's awesome.
There are currently 1 users browsing this thread. (0 members and 1 guests)
Bookmarks