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first write in standard from as
y = mx + b where m = slope of line
2x - y = 16
2x = 16 + y
y = 2x -16
therefore m =2
a parallel line has the same slope
thus m = slope = 2
2xy=2*30*2=120
15xy-2xy-7x+x=13xy-6x
No, it equals -2xy. lrn2math
Y=15/(2c+2x)
x2 + y2 = x2 - 2xy + y2 + 2xy = (x - y)2 + 2xy = 72 + 2*8 = 49 + 16 = 65 You could, instead, solve the two equations for x and y and substitute, but the above method is simpler.