architects often use the equation x+y=18 to determine height y in inces , of the riser of a step when the tread is x inches wide. express the slope of stairs designed with this equation without using variable y
I really hope and pray that someone can help me figure this out.... please thanks
algebra problem, please help?
2011-06-15 3:31 pm
回答 (2)
2011-06-15 3:55 pm
Slope of stairs does not depend on width of the tread. Supposing the depth of the tread is x inches, then the height of the riser is y inches = (18 - x) inches. Slope is height / depth, i.e. (18 - x ) / x. This is a primary school problem.
2011-06-15 3:49 pm
There is something that is not quite clear in your statement.
If you plot all the (x,y) combination of stairs, then the slope is -1. (1,17), (2,16), ...
Convert x+y = 18 into y = mx + b
But, if you look at each combination individually then each (x,y) combination has a slope of y/x.
If you plot all the (x,y) combination of stairs, then the slope is -1. (1,17), (2,16), ...
Convert x+y = 18 into y = mx + b
But, if you look at each combination individually then each (x,y) combination has a slope of y/x.
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