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# Working simultaneously at their respective constant rates, machines a and b produce 800 nails in x hours. working alone at its constant rate, machine a produces 800 nails in y hours. in terms of x and y, how many hours does it take machine b, working alone at its constant rate, to produce 800 nails? (a) x/(x+y) (b) y/(x+y) (c) xy/(x+y) (d) xy/(x-y) (e) xy/(y-x) ### Another question on Mathematics Mathematics, 05.02.2019 00:51
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When the robot makes a turn, it would be useful to have an operation to perform on d to represent this turn. this is because after making a turn, the new value of d will depend on the old value of d. complete the table for the new values of d if the robot is turning left or right. then determine an expression in terms of d that will give the new position if the robot turns left and another expression if the robot turns right. type these expressions in the last row of the table.
Working simultaneously at their respective constant rates, machines a and b produce 800 nails in x h...
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