Use gauss-jordan elimination to solve the following linear system.
–x + 6y = 20
–x + 3y = 8

a. (–2,–2)
b. (3,2)
c. (4,4)
d. (0,5)

The correct option is C) (4,4)

Step-by-step explanation:

Given linear system is :

Solve using Gauss - jordan elimination

It is an algorithm that can be used to solve systems of linear equations and to find the inverse of any invertible matrix.

Divide row(1) by -1

Add row(1) to row(2)

Divide row(2) by -3

Add (6 * row(2) ) to row(1)

Hence the corresponding values of x and y are (4, 4)

Therefore, the correct option is C) (4,4)

$450.00 for 6 weeks

or

$300

step-by-step explanation:

$200.00 for first week $50.00 x5 equals $250 plus $200 equals $450.00 for six weeks.

$200 for first week

$200 x 0.10 = $20

$20 x 5 = $100

$200 + $100 = $300