Distributive property ( me and show work first one to answer right gets brainiest answer )

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

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)

Express -5 2/5 as an improper fraction.