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Mathematics 7 Online
OpenStudy (anonymous):

Evaluate xy^3-xy if x=3 and y= -2 a. 18 b. 30 c. -18 d. 4 e. none of the above

OpenStudy (anonymous):

i got 30

OpenStudy (eric_d):

wrong

OpenStudy (eric_d):

Plug in the given values into the expression

OpenStudy (anonymous):

the only other answer i got was -18 i tried 2 methods.

OpenStudy (anonymous):

Plug in 3 for x and -2 for y, then evaluate. |dw:1410747462974:dw|

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