Is this function linear or nonlinear?

y = 2x to the 2nd power - 4

a) nonlinear

b) linear

Which expression shows the sum of the polynomials with like terms grouped together

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.