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Mathematics 8 Online
OpenStudy (majikdusty):

Suppose that z is a linear function of x and y with slope 1 in the x direction and slope -3 in the y direction (a) A change of -0.4 in x and 0.2 in y produces what change in z? change in z = (b) If z=5 when x=7 and y=5, what is the value of z when x=7 and y=4.7? z =

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