Question

Question 8

There is no solution to the system below.

x + 3y = 7
2x + 6y = 9

True
False

Answer 1

true

Answer 2

[1 3 7 ]
[2 6 9 ]
inverse of
[1 3]
[2 6]
is singular so no solution
TRUE

Answer 3

x=7-3y
substitute gives
14-6y+6y=9
gives 14=9 which is false.
So no solution.
Answer True there is no solution.

another method:
multiply 1st line by 2 gives 2x+6y=14
so again 14=2x+6y=7 with same result.

Answer 4

true

Answer 5

[1 3 7 ]
[2 6 9 ]
cannot take inverse because matrix is singular so no solution
TRUE