Question

Need Help Please

Answer 1

http://prntscr.com/2947b5

Answer 2

@austinL Need Help Here

Answer 3

@shamil98 Need Help

Answer 4

@eliassaab

Answer 5

Subtract the first equation from the second one, you get the third one. What can you deduce?

Answer 6

@eliassaab are we doing it in matrix form

Answer 7

eqn3= eqn2 - eqn1
That means that the three equations are not independent. You can forget about the third one on solve the first two in terms of z

Answer 8

x + y = 9-z
, 2 x - 3 y = 7-4z
Solve these two equations in two unknowns

Answer 9

You get
\[

\left\{\left\{x\to \frac{1}{5} (34-7 z),y\to \frac{2
z}{5}+\frac{11}{5}\right\}\right\}
\]

Answer 10

z is anything
So ther is an infinite number of soultions

Answer 11

@eliassaab but it was marked incorrect

Answer 12

C is wrong

Answer 13

ok thank you

Answer 14

No it is A

Answer 15

@eliassaab i have another question. can you help me out with it

Answer 16

Put it as anew problem and let me know about it

Answer 17

ok