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OpenStudy (anonymous):
Write the function that models each relationship. Find z when x=4 and y=8. z varies jointly with x and y. When x=2 and y=2, z=7.
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OpenStudy (anonymous):
@xoxoLoveBre
OpenStudy (anonymous):
well it could be z=2(x+y)-1 check z=2(2+2)-1=7 z=2(4+8)-1=23
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