Mathematics
ddpontious1
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which ordered pair is a solution of the system of equationsy=-3/5xx-3y=-42A.(70,-42)B.(-21,63/50)C.(5,3)D.(-15,9)

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BettieZumbrunnen

y=-3/5x x-3y=-42 Plug the first one into the second one, for 'y' : x - 3(-0.6x) = -42 x + 1.8x = -42 2.8x = -42 x = -42/2.8 = -15 Plug this back into the first equation above: y = -0.6(15) = 9 The 'ordered pair' is (-15, 9).  That's choice (D.).

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