Posted by Kristie on Wednesday, December 15, 2010 at 3:30pm.
The subject is not college, nor at college level.
2r + 2.5 t = 30
Plot that straight line in a x,t coordinate graph.
Draw straight vertical ines from three x values of your choice and see at what t values the vertical line is intersected by the 2r + 2.5 t = 30 line.
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