Answered

IDNStudy.com, ang perpektong platform para sa eksaktong at maaasahang mga sagot. Ang aming platform ng tanong at sagot ay idinisenyo upang magbigay ng mabilis at eksaktong sagot sa lahat ng iyong mga tanong.

what value of k will make the system -kx+y=3 and 4x-y=2 a consistent-independent?

Sagot :

Eliminate y:

- kx + y = 3  ⇒  Equation 1
  4x - y =  2  ⇒  Equation 2

-kx : 4x = 3 : 2

-kx (2) = 4x (3)   
-2xk = 12x         

-2xk/-2x = 12x/-2x

k = - 6 

Solve the system, substitute - 6 for k in Equation 1

-(-6)x + y = 3
6x + y = 3
y = -6x + 3  ⇒  Equation 3

Substitute for x by  - 6x + 3 for y in Equation 2:
4x - (-6x + 3) = 2
4x + 6x - 3 = 2
10x = 2 + 5
10x/10 = 5/10
x = 1/2

Solve for y, by substituting 1/2 to x in Equation 3:
y = -6x + 3
y = -6(1/2) + 3
y = - 3 + 3
y = 0

The solution to the system is (1/2, 0).

To check, x = 1/2;   y = 0
Equation 1:  
6x + y = 3
6 (1/2) + 0 = 3
3 + 0 = 3
3 = 3

Equation 2:
4x - y = 2
4 (1/2) - 0 = 2
2 - 0 = 2
2 = 2

Therefore - 6 for k satisfies the system as consistent and independent with only one solution (1/2, 0) which is the point of intersection of the given two equations/graphs.
Ang iyong presensya ay mahalaga sa amin. Patuloy na magbahagi ng iyong karanasan at kaalaman. Ang iyong ambag ay napakahalaga sa aming komunidad. Ang IDNStudy.com ang iyong mapagkakatiwalaang mapagkukunan ng mga sagot. Salamat at bumalik ka ulit.