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Mathematics 18 Online
OpenStudy (anonymous):

Write an inequality to represent the problem (1 pt.) and then solve the inequality by writing the pairs which solve it (1 pt.). Find all sets of two consecutive positive odd integers whose sum is less than or equal to 18.

OpenStudy (anonymous):

can you just help me work my way to an answer please. . thanks

terenzreignz (terenzreignz):

How do you represent two consecutive odd integers? Say m is your lesser odd integer. How do you represent the next odd integer?

OpenStudy (anonymous):

n?

terenzreignz (terenzreignz):

Well, sure, but that complicates things... Keep things in terms of m... (i.e. express it with only m as the unknown)

OpenStudy (anonymous):

okay so you want a number?

terenzreignz (terenzreignz):

Well, I want an expression... YOU need an expression. Tell me if you're stuck.

OpenStudy (anonymous):

okay so m2=18?

OpenStudy (anonymous):

\[m2\le18\] sorry i ment this

terenzreignz (terenzreignz):

m2? What do you mean by m2?

OpenStudy (anonymous):

m times 2

terenzreignz (terenzreignz):

Oh no, okay, my question was, if m is an odd integer, how would you express the next odd integer? Say, your odd integer is 15. What's the next odd integer?

OpenStudy (anonymous):

17

terenzreignz (terenzreignz):

What about 23? What's the next?

OpenStudy (anonymous):

25

terenzreignz (terenzreignz):

How about 37?

OpenStudy (anonymous):

39

terenzreignz (terenzreignz):

See... What did you do to 15 to get 17? What did you do to 23 to get 25? What did you do to 37 to get 39?

OpenStudy (anonymous):

added 2

terenzreignz (terenzreignz):

Precisely... so in general, if m is an odd integer, how do you express the NEXT odd integer?

OpenStudy (anonymous):

add 2

terenzreignz (terenzreignz):

so... the next odd integer is...?

OpenStudy (anonymous):

i dont understand your question

terenzreignz (terenzreignz):

I figured, what I wanted from you was to understand that if m is an odd integer, the next odd integer is m+2 Catch me so far?

OpenStudy (anonymous):

so it would be o?

terenzreignz (terenzreignz):

No, just m+2 The order of letters in the alphabet makes no difference in maths... divorce those two concepts, the sooner, the better.

OpenStudy (anonymous):

okay so then what would i do

terenzreignz (terenzreignz):

Just understand, for now that m is your odd integer and the next odd integer is m+2 It MOST EMPHATICALLY does NOT mean two letters past m in the alphabet. Just plainly and simply m+2 Catch me so far?

OpenStudy (anonymous):

yep

terenzreignz (terenzreignz):

Just to make sure, if I were to ask you to represent three consecutive integers, with n being the first integer, how would you represent them?

OpenStudy (anonymous):

m+3??

terenzreignz (terenzreignz):

No. If n is an integer, what's the integer directly following it?

OpenStudy (anonymous):

umm im not following

terenzreignz (terenzreignz):

3 __ __ What are the two next integers? How did you get them?

OpenStudy (anonymous):

5 7 you add 2

terenzreignz (terenzreignz):

two next INTEGERS NOT two next ODD integers.

OpenStudy (anonymous):

so 4 5

terenzreignz (terenzreignz):

Yes... how did you get them?

OpenStudy (anonymous):

added 1

terenzreignz (terenzreignz):

Okay, so what if you're given an arbitrary integer n? n __ __ What are the next two integers?

OpenStudy (anonymous):

im not understanding what you mean do you want a nmumber or variables?

terenzreignz (terenzreignz):

variables. numbers will never work.

OpenStudy (anonymous):

so it would be o p

terenzreignz (terenzreignz):

no... it has to be in terms of n~ You may only use the variable n.

OpenStudy (anonymous):

n1 n2

terenzreignz (terenzreignz):

n1? n times 1?

OpenStudy (anonymous):

n+1

terenzreignz (terenzreignz):

and n+2. I hope that much is clear to you. Shall we continue with the problem?

OpenStudy (anonymous):

yes

terenzreignz (terenzreignz):

Okay, so it says two consecutive odd integers must have a sum less than or equal to 18... What are our two consecutive odd integers again?

OpenStudy (anonymous):

like 5 and 7 soo i added two

terenzreignz (terenzreignz):

No, I meant our general odd integers m and m+2 how would you express their sum?

OpenStudy (anonymous):

oh okay i understand now thank you

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