9and 5 twelves, minus 6 and 7 twelves

2 5/6.

Step-by-step explanation:

9 5/12 - 6 7/12

= (9 - 6) + ( 5/12 - 7/12)

= 3 + (- 2/12)

= 3 - 1/6

= 2 5/6  (answer).

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.