How do I do the work?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

41/17 as a decimal rounded to the nearest hundredth

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.