Suppose that z varies jointly with x and y . Find the constant of proportionality k if z = 280 when y = 20 and x = 14 . k = Using the k from above write the variation equation in terms of x and y . z = Using the k from above find z given that y = 34 and x = 24 . z = If needed, round answer to 3 decimal places. Enter DNE for Does Not Exist, oo for Infinity
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