5x + 14y - -5
-3x + 10y = 72

Can someone pls ! pls answer all. no explanation needed..

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa