Question

Which represents the compound inequality x < -2 or x ≥ 3 using interval notation? A. x e(-∞,-2) U [3,∞) B. x e(-∞,-2) n[3,∞) c. x e(-2,3] d.x e(-∞,-2] Need help i dont understand this one at all.

Answer 1

x< -2
so x can go from -infinity to -2

\[also , x \ge 3 , \]
so x can go from \[[ 3 , \infty)\]

Answer 2

so just put union U in the centre as both can be the results

Answer 3

tell me the answer :)

Answer 4

Which is the solution set of the compound inequality?

-4 < a + 2 < 10
http://prntscr.com/2yxwyj <--- list of answers
need help on one more after this if you can.

Answer 5

no problemo

Answer 6

okay , so , first

-4 < a + 2

subtract 2 from both sides

-4 -2 < a +2 -2

-6 < a


then the second one

a + 2 < 10

solve similarly and tell me what u get

Answer 7

so i subtract 2 from both sides?

Answer 8

yep , the aim is to get 'a' alone on one side

Answer 9

so then its a<10

Answer 10

no , from both sides , remember ?

Answer 11

u cant subtract just on one side

Answer 12

so then its a<8

Answer 13

exactly

Answer 14

now put union U

Answer 15

okay and then this one http://prntscr.com/2yxys1

Answer 16

use what i taught you , and tell me what u get

Answer 17

ill check it

Answer 18

B?

Answer 19

B. x e(-∞,-2) n[3,∞)

Answer 20

ya

Answer 21

okay

Answer 22

@hazem-wardat , dont just give the answer , we have to help them understand it

Answer 23

okay thank you

Answer 24

its no use if they dont master it on their own , u wont be there during the exam

Answer 25

ur welcomr :D

Answer 26

for which one?

Answer 27

ok am sorry but B. x e(-∞,-2) n[3,∞)
is the right answer

Answer 28

ur third answer is B , as u rightly chose

Answer 29

@Ang3lEyez96 Hey! If somebody helps you, it is good to give them a Kudos! :D