It takes caroline 1 hr to ride the train to work and 1.5 hr to ride the bus. every week, she must make at least 5 trips to work, and she plans to spend no more than 6 hr in travel time. if a train trip costs $5 and a bus trip costs $4, how many times per week should she ride each in order to minimize her cost?

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?

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