What is the estimated value of 1,925

What expression is equivalent to 42x-56y

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

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.