+0  
 
0
63
1
avatar+588 

The sales of homes in a new development have been increasing. In January, 8 homes were sold, in February, 12 homes were sold. In March, 16 homes were sold. This pattern continued for the remainder of the year.

 

What is the explicit rule that can be used to find the number of homes sold in the nth month of the year?

 

  • an=4n+4
  • an=āˆ’4n+4
  • an=4nāˆ’4
  • an=āˆ’4nāˆ’4
adore.nuk  Feb 7, 2018
Sort: 

1+0 Answers

 #1
avatar+85894 
+1

Note the  pattern

 

8, 12, 16, 20........  =

 

4(2), 4(3), 4(4), 4(5)......  =

 

4 + 4, 4 + 4 + 4, 4 + 4 + 4 + 4, 4 + 4 + 4 + 4 + 4......  =

 

4(1) + 4, 4(2) + 4, 4(3) + 4, 4(4) + 4

 

So.......the explicit rule is

 

an  = 4n + 4

 

 

cool cool cool

CPhill  Feb 7, 2018

14 Online Users

avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details