+0  
 
+1
30
1
avatar+414 

The lines $-2x + y = k$ and $0.5x + y = 14$ intersect when $x = -8.4$. What is the value of $k$?

 
gueesstt  Apr 14, 2018
Sort: 

1+0 Answers

 #1
avatar+12227 
+1

-2x+y = k     and .5x + y = 14        Use the second equation to find y when x = -8.4

                          .5(-8.4) + y = 14      results in y = 18.2

 

Sub this into the FIRST equation to comput value for k

-2(-8.4) + 18.2 = k         k=35

Here is a graph:

 

 
ElectricPavlov  Apr 14, 2018

18 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