Retirar dos parênteses e depois calcular: A) (+3)+(+2)+(+1)= B) (-8)+(-1)+(-10)=
C) (5)+(-4)+(+1)= D) (+4)-(-8)-(4)=
E) (6)-(+3)-(+4)= F) -(+2)-(3)-(+4)-(-5)=
G) -(3)-(+5)-(6)+(-5)= H) -(3)-(+5)-(6)+(-5)= ME AJUDEM POR FAVOR!!!

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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)

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x, y) coordinate plane?