Find the value of n in the solution to the system of equations shown. Math item stem image CLEAR CHECK n = 12 1 2 n = 54 5 4 n = 5 n = 2

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

The table below shows the angle measurements for triangle abc and triangle xyz. if triangle abc is similar to triangle xyz, what does angle z equal, in degrees?