2х + зу = 9
-2х + 2y = 6
the y-coordinate of the solution to the system shown is
3
5
9
15

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

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.