Question 89993
X+2Y=-4 OR 2Y=-X-4 OR Y=-X/2-4/2 OR Y=-X/2-2 (RED LINE)
X-Y=5
-Y=-X+5 OR Y=X-5 (GREEN LINE)
{{{ graph( 300, 200, -6, 5, -10, 10, y = -x/2 -2, y = x -5) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -x/2 -2 and y = x -5).
ANSWER (2,-3).
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L=W+30 THEN THE PERIMETERIS:
2(W+30)+2W=460
2W+60+2W=560
4W=560-60
4W=500
W=500/4
W=125 YDS.
L=125=30
L=155 YDS.
PROOF
2*125+2*155=560
250+310=560
560=560