The marked price of a cellphone is $140 after a markup of 25%. Calculate i.) the cost price for this phone. [2]
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Alright...so the coordinates of an ordered pair have opposite signs [one sign is positive while the other is negative] so we could have an example of (-x,+y) or (+x,-y) ...that means out of the 4 quadrants these points could be in the 2nd quadrant or the 4th quadrant or corners of the graph
