Use gauss-jordan elimination to solve the following linear system:
5x-2y=-2
-x+4y=4

x = 0 y = 1.

Step-by-step explanation:

Write it in matrix form  ( r1 and r2 refer to row 1 and row 2):-

( 5  -2 |  -2)     r1

(-1    4 |   4)     r2

4r2 + r1 --> r1 :

( 1   14 |  14)

(-1    4 |   4)

r2 + r1 ---> r2

( 1   14 |  14)

( 0  18 |  18)

r2 / 18:

( 1   14 |  14)

( 0   1  |    1)    So y = 1.

r1 - 14r2 = r1

( 1    0 |   0)   x = 0

( 0   1  |    1)

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: