Question

Solving each system of linear equations using determinants...

1.) 3x-10y=15
2x+3y=-26

2.) 3x+2y=3
2x-5y=-17

3.) 4x-9y=2
5x+3y=-26

4.) 4x+3y=-9
2x+y=-5

5.) 2x+5y-22=0
x-3y=0


Please Please Solve. I need a good answer. Thankyou :) GBY.

Answer 1

Answeeeeerr :(

Answer 2

Maybe people don't want to answer u because you are asking 5 questions involving matrices which will take a lot of time for someone to answer.

Besides, these are not difficult, just use Ax = b and x = A^-1b where A is the inverse matrix and do the calculations.

Or maybe just post 1 of the questions and someone will maybe explain u how to do it, then you can do the others by yourself.

Answer 3

ick this are annoying.

Answer 4

first one is
\[(-\frac{215}{29},-\frac{108}{29})\]

Answer 5

you need the method?

Answer 6

you here?

Answer 7

says use determinants. the denominate of these is the determinant of

3 -10
2 3

namely
\[3\times 3-(-10)\times 2=29\]

Answer 8

denominator is the word i was looking for

Answer 9

He replied in the other one saying he needs the method.

Answer 10

jeez ok maybe i write it here. just was trying to say that to find y you take the determinant of
3 15
2 -26

get
\[3\times -26-2\times 15=-108\]

Answer 11

then put
\[\frac{-108}{29}\] and similarly for x find the determinant of

-10 26
15 3

namely
\[-10\times 3-15\times 26=-215\]

Answer 12

same for others. routine donkey work. i would use software