Question

Solve 4x > 36 and x + 5 < 8.
a) x < 9 or x > 3
b) 9 < x < 3
c) 3 < x < 9
d) no solution
I know the left side equals 9 and the right equals 3, and I'm thinking it's C but then it's switching sides with the whole problem and that makes me think it's B. Help me!

Answer 1

no solution
hw could x be greater than 9 and less than 3 :)

Answer 2

ooohhh, okay! so you don't switch the sides at all, so that makes it weird! Right? *derp*

Answer 3

well wait
@sjerman1 lil. help here?

Answer 4

ahhhhhh, i remember these... hold on it was a while ago...

Answer 5

i know there is a sign change when moving constants but i forgot, i need to do some research to remember

Answer 6

c

Answer 7

addition and subtraction doesnt change the direction of the sign, multiplication and division do. so the answer is c @sarah.radke

Answer 8

oh oh oh wait

Answer 9

I guess its D

Answer 10

4x > 36 and x + 5 < 8.
x < 9 and x < 3

Answer 11

well as per my calculation,its D ,becoz answer is contradicting

Answer 12

is it a bad thing that i'm really confused now? :P

Answer 13

inequality equations are nasty smtyms -_-

Answer 14

4x > 36 and x + 5 < 8.
x < 9 and x < 3
that is what i can say. but none of your answers match up, so either its d or im wrong.
@phi can you take a look please?

Answer 15

4x > 36

redo this one. after simplifying it you can check that it still "works"
example: x=0 give 4*0> 36 0>36 No. so 0 does not work. Now look at your simplified version x < 9 with x=0: 0< 9 Now it is true. But we know 0 should not work, so you flipped the < when you shouldn't have.

Answer 16

i forgot the rules, but that is a very easy way to check, my apologies @sarah.radke, thank you @phi

Answer 17

4x > 36 and x + 5 < 8.
corrected to:
x > 9 and x < 3

Answer 18

Ooohhh! Okay, that makes sense ^.^ Thank you so much guys (:

Answer 19

well then it goes with D :| no solution

Answer 20

this choice
b) 9 < x < 3

should not be written this way. you should only write
3< x < 9 where x is between the 2 numbers

x >9 is now in between 3 and 9, so this if very confusing. I hope it's a typo. and not a real choice.

Answer 21

it's not a typo, I checked a lot, trust me! That's what the multiple choice sheet says.

Answer 22

well
its not exam anway :P
so ask in your school tomorrow.maybe they could help.

Answer 23

@aajugdar I wish, I'm home schooled. :P

Answer 24

ooh
you are in jail :D

Answer 25

kidding :P

Answer 26

Imma just go ahead and put 'no solution' and hope for the best :P

Answer 27

haha x)
there you go

Answer 28

@phi
how can a number be greater than 9 and less than 3????????????

Answer 29

it is greater than 9 OR less than 3

Answer 30

well
equations with power 2 or more have solutions which are more than 2.
and these are not.
so there cant be two values. so I dnt think its valid.

Answer 31

@phi

Answer 32

yes, you are right. there is no solution for
Solve 4x > 36 AND x + 5 < 8.

Answer 33

it helps to read the question.

Answer 34

:)

Answer 35

thank you so much guys (: i love you all!