Question

Which expression is equivalent to –3x + 9?

Answer 1

What are you expressions that you have to compare it to?

Answer 2

A.
–3(x + 9)
B.
–3(x – 3)
C.
–3(x + 12)
D.
3(–x – 3)

Answer 3

Okay, first, solve the given equation:
-3x + 9 = 0
-3x = -9
x = 3

Answer 4

im really bad a solving equations :/

Answer 5

Now plug in 3 to the given answers and see if it = 0. I'll do A for you.
-3(x + 9) = 0
-3((3) + 9) = 0
-3(12) = 0
-36 = 0
False.
So a is not correct.

Answer 6

Do you understand what I'm doing?

Answer 7

to be honest no....i get really confused

Answer 8

That's okay.

Think of x as a question mark: x = ?
2 + ? = 3
Do you know what that is?

Answer 9

not really....i just dont understand

Answer 10

Okay, solve this:
1 + ____ = 2

Answer 11

1 plus what equals 2

Answer 12

1

Answer 13

Yeah, so:
1 + x = 2
x is just a place holder, or an unknown number.
x + 6 = 7
x + 4 = 5
For both of those equations, x = 1. Do you understand how x works now?

Answer 14

sky hello

Answer 15

Sky, what grade are you in?

Answer 16

We are factoring out the common multiple
-3x+9
remember hat 3*3=9 so
-3x+3*3<---- as you can see 3 or -3 is common in both terms so we can "factor" it
-3(x-3)<---- you can do a check to see if this is right by multiplying through the terms by -3

Answer 17

dan that's too hard for her.

Answer 18

i feel stupid.

Answer 19

im a freshman

Answer 20

You're not stupid