A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
I need help!
12x5/12 + 3x/4 < 4/3
*** supposed to be a less than or equal to, but I don't have that sign.
anonymous
 one year ago
I need help! 12x5/12 + 3x/4 < 4/3 *** supposed to be a less than or equal to, but I don't have that sign.

This Question is Closed

phi
 one year ago
Best ResponseYou've already chosen the best response.1you can use <= or less than or equal

phi
 one year ago
Best ResponseYou've already chosen the best response.1is it \[ \frac{12x5}{12} + \frac{3x}{4} \le \frac{4}{3} \] ? I would multiply both sides by 12 (that means *every* term on both sides) as a first step. can you do that ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So like distribute a 12 in?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.012x5+3 (3x) <= 16?

phi
 one year ago
Best ResponseYou've already chosen the best response.112 x's take away 3 x's and 5+9

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. now divide both sides by 9 (remember it's ok to divide by positive numbers)

phi
 one year ago
Best ResponseYou've already chosen the best response.1\[ \frac{9x}{9} \le \frac{12}{9} \] and 9/9 on the left side simplifies to 1

phi
 one year ago
Best ResponseYou've already chosen the best response.1and we can simplify 12/9 (divide top and bottom by 3)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Uhm but I think the answer is supposed to be x greater than or equal to 12

phi
 one year ago
Best ResponseYou've already chosen the best response.1Are you sure we started with the correct problem? for the problem I posted we get x <= 4/3

phi
 one year ago
Best ResponseYou've already chosen the best response.1if the answer is really x>= 12 then x= 2 should work (but won't because we know x<= 4/3 (1 and 1/3) ) using x=2 in the problem \[ \frac{12x5}{12} + \frac{3x}{4} \le \frac{4}{3} \\ \frac{245}{12} + \frac{32}{4} \le \frac{4}{3} \\ \frac{19}{12} +\frac{3}{12} \le \frac{4}{3} \\ \frac{22}{12} \le \frac{4}{3} \\ 1.833... \le 1.333... \] which is not true (as we know)

phi
 one year ago
Best ResponseYou've already chosen the best response.1Here are the possible problems: 1) typo in the problem 2) typo in answer key

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Wait... it's actually a problem that some one did and I have to explain where they went wrong

phi
 one year ago
Best ResponseYou've already chosen the best response.1maybe if you post a copy of the page...

phi
 one year ago
Best ResponseYou've already chosen the best response.1take a screen shot or a picture

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How do I post the picture tho?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It doesn't say that for me

phi
 one year ago
Best ResponseYou've already chosen the best response.1are you at a computer or using the iPad app?

phi
 one year ago
Best ResponseYou've already chosen the best response.1do you see a paper clip icon ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0just got on laptop gimme a sec

phi
 one year ago
Best ResponseYou've already chosen the best response.1do you see what they did wrong?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0they didnt change the 4/3?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. as for *our problem* we started with (12x5)/12 and it should be (2x5)/12

phi
 one year ago
Best ResponseYou've already chosen the best response.1of course that changes everything.

phi
 one year ago
Best ResponseYou've already chosen the best response.1can you do the work ? this one is more tricky because we will get a negative x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im stuck at x+4<=16

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i subtract 4 and then divide by 1 right?

phi
 one year ago
Best ResponseYou've already chosen the best response.1with relations, if you divide by a negative number you have to remember to flip the relation once you get to x <= 12 you can divide by 1 and flip to get x >= 12 or , remember it's always safe to add or subtract. so we could add +x to both sides: x + x <= 12 + x 0 <= 12 + x now add 12 to both sides 12 <= x which can also be written x>= 12
Ask your own question
Sign UpFind more explanations on OpenStudy
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.