Either c or d (I’ll mark u as brainlist)

C.

Step-by-step explanation:

The top system of equations has the solutions:

x = -(236/3) y = -(44/3)

C. System of equations has:

x = -(236/3) y = -(44/3)

D. System of equations has:

x = -(204/19) y = -(44/19)

the correct answer is 1: 2

step-by-step explanation:

hope this your welcome : )

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.