Which of the following is a function? Explain why you chose the one you did. a. (3,5) (2,5) (6,1) (7,8)
b. (0,0) (1,1) (2,2) (1,3)
c. (-2,2) (3,2) (3,5) (-2,4)
d. (10,11) (10,12) (3,5) (6,9)

In angle pqr find the measure of

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)

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?