Question

Help?
a+8-2(a-12)>0

Answer 1

Can you help me with a+8-2(a-12)>0 ?
I've done:
a+8-2(a-12)>0
a+8-2a+24>0
-a+32>0
-32 -32
-a>-32

Answer 2

a+8-2a+24>0
-3a+32>0
-32 -32

-3a>-32

Answer 3

But thats not one of my answer choices. ):
I have:
A. a<32
B. a>-16
C. a<-16
D. a>32

B. Is NOT the answer either, because thats what I put and its wrong so Im doing an Error Analysis. Fun. /:

Answer 4

Ok hold on, im working on it

Answer 5

Ok. Thanks.

Answer 6

I personally think its, A. or D.

Answer 7

Ok, up to the -a>-32, you did it perfectly. Now, you need to divide both sides by -1, ans remember to flip the sign becuse you flip it when dividing of multiplying by a negative number. so now you have a<32

Answer 8

because*

Answer 9

a + 8 - 2(a - 12) > 0
a + 8 - 2a + 24 > 0
-a + 32>0
-a + 32 - 32 > 0 - 32
-a > -32 ---> (-1)-a > (-1) - 32
a < 32 (multiplying by a negative changes the sign)

The reason you want to multiply by a -1 is to make the " a " positive. But what you do to one side of the inequality, you have to do to the other side. And when you multiply by a negative, it changes the sign.
Your answer is A :)

Answer 10

Thanks @texaschic101 @Butterfly16 @zaynahf ! (:

Answer 11

not a problem...thats what we are here for :)