In the diagram, the measures of Z2, Z3 and Z6 are 40°. The measure of 21 is 140°. Are lines cand d parallel?

An equation where variables are used to represent known values—function notation true or false

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

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.