Question

|x + 3| < 10 is x < 7 ; x > -7 ?

Answer 1

Swing and a miss

Answer 2

-13 < x < 7

Answer 3

how?

Answer 4

like can you show me the work?

Answer 5

Do you know what the | | signs mean?

Answer 6

absolute value

Answer 7

yes -7<x<7

Answer 8

so it's correct? :]

Answer 9

Lol, there was me hoping you'd type everything out for me do_0b.ie, but no, you're wrong.

Answer 10

yea, just plug in the numbers

Answer 11

You're hopelessly wrong, sorry.

Answer 12

still wrong

Answer 13

-13 < x < 7 is the answer

Answer 14

how'd you do it strobe?

Answer 15

-13 < x < 7 forgot negative side

Answer 16

The way I do it is just picture the graph in my head and see where it intersects the line y = 10. This is quick but not formal, do you need the formal working?

Answer 17

haha

Answer 18

just how'd you got the answer. like if you added, subtracted, multiplied. :)

Answer 19

| x + 3 | < 10
=> x + 3 < 10 AND x + 3 > - 10
=> x < 7 AND x > -13

Answer 20

for this one -7 < x+3 < 10

Answer 21

subtract 3 from both sides

Answer 22

now i see it (: thanks!!

Answer 23

No problem, I would suggest drawing it as a graph if you cant get the answer. Helps you see the answer.

Answer 24

-10 < |x + 3| < 10
-10 - 3 <x<10-3
-13< x < 7
since it is less than 10 the domain is
(-13,7)
look at the number line


Notice I used round brackets instead of square because it never hits -13 or 7 it gets infinitely close to them