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Mathematics 19 Online
OpenStudy (anonymous):

Solve. –5t ≥ 65 (Points : 1) t ≥ 13 t ≤ 13 t ≥ –13 t ≤ –13

jimthompson5910 (jim_thompson5910):

hint: -5t is really "-5 times t" and think of the operation that undoes multiplication

OpenStudy (anonymous):

um what im not understanding @jim_thompson5910

jimthompson5910 (jim_thompson5910):

what operation is the opposite of multiplication?

OpenStudy (anonymous):

division @jim_thompson5910

jimthompson5910 (jim_thompson5910):

so you have to divide both sides by what number?

OpenStudy (anonymous):

i just need to know the sign

OpenStudy (anonymous):

i know its a positive number and 13 but i dont know the sign so if u could help me with tht it would be gr8 @jim_thompson5910

jimthompson5910 (jim_thompson5910):

you divide both sides by -5 to isolate t

jimthompson5910 (jim_thompson5910):

65/(-5) = -13 NOT positive 13

jimthompson5910 (jim_thompson5910):

and the inequality will flip because you're dividing both sides by a negative number

OpenStudy (anonymous):

but 65 isnt a negative

jimthompson5910 (jim_thompson5910):

yes which is why 65/(-5) = -13

OpenStudy (anonymous):

its a positive which is wht im seeing

OpenStudy (anonymous):

ohhhh i understand so if the both wre negative than the equality would be a positive right @jim_thompson5910

jimthompson5910 (jim_thompson5910):

exactly

OpenStudy (anonymous):

so i flip nthe sign basically is tht wht youre saying @jim_thompson5910

jimthompson5910 (jim_thompson5910):

yes you do

jimthompson5910 (jim_thompson5910):

the inequality will flip because you're dividing both sides by a negative number

OpenStudy (anonymous):

wow u just made me understand completely everything tht i had a problem on lol

OpenStudy (anonymous):

thank you so very much i appreciate it @jim_thompson5910

jimthompson5910 (jim_thompson5910):

you're welcome, I'm glad to be of help

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