What is the value of 3×^2+4y^2 if x=2 y=1,and z=-3

Can someone answer these problems for me

Which parent function is an example of a piecewise function? answers: linear parent function quadratic parent function an exponential parent function absolute value parent function pls i’m sorry if this doesn’t make sense

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie