Answer:
None of them are solutions
Explanation:
To find out if each ordered pair is a solution or not, substitute the x or y value into your equation (2x-9y=15)
For the ordered pair, (7,5) you would do
2(7)-9(5)=15
This is 14-45=15 which simplifies to -31=15. This statement is false, so this is not a solution.
2(-6)-9(-3)=15 = 39=15 so this statement is also false.
2(-5)-9(2)=15 = -28=15 which is not a solution
2(1)-9(-4)=15 is 38=15 which is false.
So you should check the No for all the questions.