Using truth tables, decide if each argument is valid. see attached photo

Two lines that do not intersect are skew. always sometimes or never

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

The only way to identify an intercept is as an ordered pair. true false