word problems and turning them into algebraic equation to slove

Question

This is a toothpick problem

 

 

A grid is 6 squares by 6 squares  ( you have 36 squares)

the vertical grid is n

the horizontal grid is n

 How many toothpicks are required to make the pattern? (suggestion is how many vertical toothpicks are used.

 

 

I have a formula but not able to plug in the right numbers to get my solution

 

vertical = (n+1) xn

horizontal= (n+1) xn

 

number of toothpicks = 2x(n+1)xn

 

 

 

 

Answer 1

Your formulas look correct to me.  I'm not sure where you are having trouble.  Plugging in n=6 from the example gives:

2*(6+1)*6=84

Is this not the answer you are getting?  What makes you think it's wrong?