Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Calcmathlete
Group Title
Find the solution set of the inequality: 2x + 5 + 4x + 7 < 30
How would you do this kind of problem? I'm not familiar with how to do it when there are two separate absolute values...
 2 years ago
 2 years ago
Calcmathlete Group Title
Find the solution set of the inequality: 2x + 5 + 4x + 7 < 30 How would you do this kind of problem? I'm not familiar with how to do it when there are two separate absolute values...
 2 years ago
 2 years ago

This Question is Closed

sai1234 Group TitleBest ResponseYou've already chosen the best response.0
u can write 2x + 5 as2x + 5 or (2x + 5) like that 4x + 7 as(4x + 7) or (4x + 7) so totally there as 4 possibilities
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Alright. I'm still a bit confused...would I do them all separately?
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
plugin into wolfram ... something interesting there
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
lol...it is a bit interesting...I need to know how to do these without wolfram though...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Is that really what I do?
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
i'm not sure .... though this technique seems pretty promising
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
But all that results in is the removal of the absolute value no?
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
yep ... take square and see dw:1344019775207:dw
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
I am so confused...not going to lie...if you take the square of both sides, wouldn't you end up with the second side: dw:1344019964409:dw and where did the absolute value come back in?
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
sorry .. my bad
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1344020042743:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
looks like this is going to be quite difficult ...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Yeah...my teacher said that there was a very simple trick to this, but she never had the opportunity to teach it to me, so I'm just stuck on what to do...
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1344020241753:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
for x is positive.
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Well, turns out that sai at the beginning was correct...you just work out the 4 different cases...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
I found the solution set...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Thanks for trying though...
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
for x is negative, dw:1344020308613:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
check the value for a = 3, which is less than 30dw:1344020674321:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1344020722686:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1344020797357:dw
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Yup. I get it now. We just test out all 4 possibilities and combine the inequalities. Thank you :)
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
well ... the best would be do see carefully how it takes the least effort ...
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.