Write 7/100 as a decimal?

7/100 is "seven hundredths” (it always helps to say it out loud)
From that information, you know that the 7 will be in the hundredths place. 
The second spot after the decimal is the hundredths place, so the 7 goes there.
0.07 is your answer.

None of them are solutions

Step-by-step 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.