Fairly easy, im just not the smartest.

There wasn't a section btw

honestly bro aint no one got time to answer these dumb question just do it p***y

step-by-step explanation:

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.