SOLUTION: A set of staircases grows at a certain rate.If the rule to find out how many blocks are needed total to make a staircase with n number of steps is (n) (n)/2+1/2n=y then what is the
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Question 118864: A set of staircases grows at a certain rate.If the rule to find out how many blocks are needed total to make a staircase with n number of steps is (n) (n)/2+1/2n=y then what is the rule to find out the number of steps in the staircase if y is given?
ex.n(n)/2+1/2n=105 (solve for n)
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
if represents the number of steps and represents the total number of blocks, then:
or
.............(solve for )
given:
………..multiply by
Use quadratic formula to solve for ; we will need only positive solution
……………….. the number of steps in the staircase
Check:
………..
………..
………..
………..
………..
………..
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