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Mathematics 10 Online
OpenStudy (anonymous):

\[\frac{ -x }{ 4 }\le 7\] \[A. x \le -1.75\] \[B. x \le -28\] \[C. x \ge -1.75\] \[D. x \ge -28\]

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

you are dividing by 4, how do you undo this

jimthompson5910 (jim_thompson5910):

to move it over to the other side

OpenStudy (anonymous):

subtract 4 then addfor on the other side?

jimthompson5910 (jim_thompson5910):

subtraction undoes division?

OpenStudy (anonymous):

i mean X

jimthompson5910 (jim_thompson5910):

you're not making any sense, sry

OpenStudy (anonymous):

times

jimthompson5910 (jim_thompson5910):

oh yes, multiplication undoes division

OpenStudy (anonymous):

so then what do we do

jimthompson5910 (jim_thompson5910):

well if i divide something by 4, how do I undo that

OpenStudy (anonymous):

x4

jimthompson5910 (jim_thompson5910):

ex: 28/4 = 7 I want to go from 7 and go back to 28

jimthompson5910 (jim_thompson5910):

multiply by 4, yes

OpenStudy (anonymous):

so28

OpenStudy (anonymous):

so its B

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

-x <= 28 but you have to divide both sides by -1 now (which will flip the sign)

OpenStudy (anonymous):

oo so D

jimthompson5910 (jim_thompson5910):

yep

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