ah, those are systems you want one variable to cancel out. I would time the bottom equation by -1 so x cancels then u solve for y. then u plug all back in to solve for x.
I think it's the third one cause the 3 will b "out of the house" while the 4 will b the power.
Answer:
C, 4.123
Step-by-step explanation:
√(17) which equals 4.12