Question 647491
a)


z(x-y)


4(-2-3) ... Plug in x = -2, y = 3, and z = 4


4(-5)


-20


So z(x-y) = -20 when x = -2, y = 3, and z = 4

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b)


z(x-y)^2 - x


4(-2-3)^2 - (-2) ... Plug in x = -2, y = 3, and z = 4


4(-2-3)^2 + 2


4(-5)^2 + 2


4(25) + 2


100 + 2


102


So z(x-y)^2 - x = 102 when x = -2, y = 3, and z = 4


So far, choice B is the largest.

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c)

z(x-y)^3 + x


4(-2-3)^3 + (-2)


4(-2-3)^3 - 2


4(-5)^3 - 2


4(-125) - 2


-500 - 2


-502


So z(x-y)^3 + x = -502 when x = -2, y = 3, and z = 4


Choice C is NOT larger than choice B. So choice B is still the largest.


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d)


I'm assuming this one is {{{z/x - xy}}}


z/x - xy


4/(-2) - (-2)(3)


-2 - (-2)(3)


-2 - (-6)


-2 + 6


4


So z/x - xy = 4 when x = -2, y = 3, and z = 4

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Answer:


Choice B is has the greatest value.


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