+0  
 
0
177
1
avatar+124 

1)I have 5 different pullover shirts and 4 different button-down shirts. In how many ways can I choose shirts for the next 9 days if I insist on wearing pullover shirts two days in a row at least once? Assume that I wear one shirt each day, and every shirt gets worn once.

 

2)How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4x4 square array of dots like the one shown below?

Picture: https://latex.artofproblemsolving.com/c/b/0/cb06885af853019aa03cd8d3d48f31d63144e6c3.png

FiestyGeco  Jun 16, 2018
 #1
avatar+20153 
+1

2)

How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4x4 square array of dots like the one shown below?

Picture: https://latex.artofproblemsolving.com/c/b/0/cb06885af853019aa03cd8d3d48f31d63144e6c3.png

 

see link: https://web2.0calc.com/questions/please-help_50163

 

laugh

heureka  Jun 18, 2018
edited by heureka  Jun 18, 2018

13 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.