Question

I NEED THIS DONE ASAP!!!!! HELP ME PLZ!!!!!

Which property is shown?

-2 + (-15) = -(2 + 15)

identity property

associative property

commutative property

opposite of a sum property

What is the solution to the inequality?

5x + 8 < 12

x > -4

x < -4

x > 4

x < 4

What is the solution to the equation?

2(x + 7) = 10x - 10

x = 3

x = 2

x = -2

x = -3

What is 100,000,000 written as a power of ten?

Answer 1

Okay, I know for "What is the solution to the equation"

What we wanna do is make both sides of the equation balanced. Therefore, we take one of the answer options and substitute it in for x

Answer 2

Let's try x=3
2(3+7) = 10*3-10
3+7=10 10*3=30
2*10=20 30-10=20

Success! With x=3, we get that 3=3
Therefore, x=3 is the answer

Answer 3

Thank you thank you so much!!

Answer 4

For the last one, a power of 10 means like 10 with an exponent.

So, 10^n will equal 100,000,000
Just to make this quick, let's try 8
10^8=100,000,000

Answer 5

OK thank you thank you

Answer 6

So, its 1.0*10^8

Answer 7

Um no not really, if you didn't have the options you wouldn't be able to solve. But you can still solve, that method is considered cheating to a majority of teachers @PixieDust1.

2(x + 7) = 10x - 10
2x +14 =10x -10
-14 -14

2x = 10x -24
-10x -10x

-8x = -24
/-8 /-8

x = 3

Answer 8

Yeah, that's the long way. But they both give the same answer

Answer 9

It's just a shortcut. I'm sure her lesson taught her the long way.

Answer 10

And no, no method is considered cheating.

Answer 11

That's still considered cheat fyi. You're not suppose to use the options.. but who am I to correct you :/

Answer 12

Oh I am sorry that is my bad

Answer 13

Aplogizes on my part

Answer 14

It's okay lila, there's more then one way to solve things.
:)

Answer 15

:)

Answer 16

You're not suppose to use the option.. its a shortcut, yes. Normally solving like that is how you would arrive at 3. My point is if you didn't have the option, how would you solve?

Answer 17

Thanks

Answer 18

Good that all of this is settled! :)

Answer 19

Yup! Now we can *hopefully* return to the question! My apologies! Okay, so I guess the only two left are the first two questions

Answer 20

Yup!:)

Answer 21

Yes defintinly!

Answer 22

I need the first two questions anwsered please.

Answer 23

the answer to the first one is commutative

Answer 24

Thanks

Answer 25

@shelbygt520
Can you explain why? I wasn't sure on this one

Answer 26

Anytime. the answer to the second one is 5x + 8 > -12

5x + 8 - 8 > -12 - 8

5x > -20

5x/5 > -20/5

x > -4

Hope this helps!
http://answers.yahoo.com/question/index?qid=20110309165523AAn0uje

Answer 27

Thanks!!

Answer 28

No problem do you need the third one?

Answer 29

Nope I am good thank you

Answer 30

Anytime :)