Name the congruent triangles and justify the reason for congruence

Is this a polynomial function? i need to know asap

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Nellie is analyzing a quadratic function f(x) and a linear function g(x). will they intersect? f(x) g(x) graph of the function f of x equals one half times x squared, plus 2 x g(x) 1 5 2 10 3 15