Analyze the diagram below and complete the instructions that follow.
find the unknown side length, x. write your answer in simplest radical form.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Pls brainliest will be awarded if answer is correct