Negative 5 over 9 times 4

but has to be in simplest form

2/9

Step-by-step explanation:

Because 2/9 ask the internet.

the infinity sign

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.