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OpenStudy (anonymous):
the variables x and y vary directly. write an equation that relates x and y. then find y when x=12. x=-3, y=-5
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OpenStudy (anonymous):
could you help me with this one too? @jim_thompson5910
jimthompson5910 (jim_thompson5910):
the variables x and y vary directly again means y = kx
jimthompson5910 (jim_thompson5910):
y = kx -5 = k*(-3) solve for k
OpenStudy (anonymous):
5/3?
jimthompson5910 (jim_thompson5910):
you got it, now use this to find y when x = 12
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OpenStudy (anonymous):
20? sorry i was out.
OpenStudy (anonymous):
@jim_thompson5910 ?
jimthompson5910 (jim_thompson5910):
good, y = 20 is the answer
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