Y - 12 = 89
y - 12 +
=89 + 12
y=?

y = 101

Step-by-step explanation:

y - 12 = 89

  +12   +12

     y = 101

answer is x<

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.