Of course. These are straight lines.
Y = 5/2
Y = 2/5
The slope is 5 over 2, if they're paralell they have the same slope
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Select two parallel lines out of 5: 5*4*3/(2*1) = 30 ways Select two parallel lines out of 4: 4*3*2/(2*1) = 12 ways Combine the above 2: 30*12 = 360 parallelograms.
y=2/(3x) + 2 isn't linear so nonthing can be parallel to it as "parallel" can only apply to lines.
Yes.
5y = 2x - 5; y = (2/5)x - 1 Since two non-vertical line are parallel if they have the same slope, then 5y = 2x - 5 is parallel to any line with equation y = (2/5)x + c
A decagon has 10 sides. Any regular polygon with four or more sides will have pairs of sides that are parallel. A decagon will have 5 pairs of parallel sides.
5 over 2
Yes, a hexagon can have 0, 2, 3, 4, 5, or 6 parallel sides.
2 over 5
[ y = 2x + 5 ] has a slope of 2. [ y = 2 ] is a horizontal line ... its slope is zero. Their slopes are different, so they're not parallel.
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