Each time that Samantha rides the train, she spends $4 for her fare. Choose the equation that shows the change in Samantha's money from riding the commuter train to and from work for a week (Monday-Friday).

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

Which of the following are accepted without proof in a logical system? check all that apply.