+0  
 
+1
70
1
avatar+604 

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
 #1
avatar+12561 
+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

14 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.