I have tried everything the first 2 are incorrect but the bottom 2 are correct. Can you help me with the first 2?

The triangles are similar. what is the value of x? x=

What is the value of x in the diagram below?

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)