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OpenStudy (anonymous):
variable z varies jointly with x and y. x=-12, y=1/3 , z=30. whats the equation
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OpenStudy (radar):
2x-xy z=--------- 2y
OpenStudy (amistre64):
z = kxy 30 = k(-12)(1/3)
OpenStudy (amistre64):
30*3 ---- = k -12
OpenStudy (amistre64):
k = -5 right?
OpenStudy (amistre64):
z = -5xy
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OpenStudy (amistre64):
30*3 not equal 60 .... forgot how to multiply
OpenStudy (amistre64):
z = -7.5 xy
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