+0  
 
0
42
1
avatar

Suppose that N = 3x+4y+5z, where x equals 1 or -1, and y equals 1 or -1, and z equals 1 or -1. How many of the following statements are true? 

N can equal 0. 
N is always odd.
N cannot equal 4.
N is always even.

 Jun 29, 2021
 #1
avatar+32399 
+1

The following should help you decide:

 

 Jun 29, 2021

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