i need help with the question. the question is (look at this set of ordered pairs: 20, 1 16, -6 13, 12 13, 16, is this relation a function? yes or no?​

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

There are 18 female students and 16 male students in a class. which of the following expresses the ratio of female students to male students in simplest form? а) 10 b) 9 to 8 c) 8: 9 d)18/16