Question

4. Simplify the expression.
-3(b – 7)
This is what i got
-3 -3b -21
+3 +3
-3 b -18
18/3 =6

Answer 1

Lets start from the beginning.

Answer 2

We need to use this property, which by chance I had told you in the earlier post.

\(\sf\Large a(b+c)=ab+ac\)

Answer 3

HOWEVER, your question is \(\sf\Large -3(b-7)\)

Answer 4

Yeah

Answer 5

so since you have a problem with negative numbers, let me make it a little easier on you :)

Answer 6

\(\sf\Large -a(b-c) = -ab + ac\)

Remember to carefully look at the - and +'s :)

Answer 7

Okay. Still don't really get it.

Answer 8

just replace the a with 3

and the c with 7

Answer 9

-3(7) = -21?

Answer 10

-3(-7) 21

Answer 11

Is this right?

Answer 12

\(\sf\Large-3(b – 7)=\\\sf\Large (-3)(b) - (-3)(7)=? \)

Answer 13

and that is correct :)

Answer 14

So i do need to do anything else with this problem?

Answer 15

but 21 isn't the final answer.

Answer 16

so far you have gotten:

\(\sf\Large (-3)(b) - (-3)(7)=-3b-(-21)\)

Answer 17

Why is it saying i'm typing and half the time i'm not. XD

Answer 18

So do i solve for b?

Answer 19

that's an OpenStudy glitch xD

Answer 20

and no, just simplify that

what is - (-21) = ?

Answer 21

Positive 21?

Answer 22

correct

Answer 23

so your final answer would become:

\(\sf\Large -3b+21\)

Answer 24

Alright thank you so much ^ ^

Answer 25

:)

Answer 26

Openstudy not letting me close the question

Answer 27

refresh, maybe?