14. If you were to use Gauss-Jordan elimination on the following linear system, what would the augmented matrix be? 3w - x = 2y + 2 - 4
9x - y + z = 10
4w + 3y - 2 = 7
12x + 17 = 2y - Z + 6
3 -1 7
13 -1 -2 -1
-1 0 1
A.
0 3 - 1
12 -2 10
13-1 2 1-4
09-1 110
B.
o 12 2 -1 6
13 -1 -2 -1 -4
To 9-1 1 10
c.
0 3 -1
O 12 2 1
3 -1 -2 -1
-1 1
D.
o 3 -1
LO 12-2 1 -11

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.