Which are names of a line in plane M?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.

Two garden plots are to have the samearea. one is square and one isrectangular. the rectangular plot is 4meters wide and 9 meters long.

College students signed up to be subjects in a psychology experiment. when they arrive, they are told that interviews are running late, and they are left in a waiting room. the experimenters have placed a cell phone in the room and the subjects are told not to answer the phone no matter how many times it rings. some subjects are in the room alone and others are in pairs; these are the treatments being compared. will the subject answer the phone? the students agreed to take part in an unspecified experiment, and the true nature of the experiment is explained to them afterward. does this meet the requirement of informed consent? explain. yes, because they agreed to participate in an experiment yes, because they are not forced to answer the phone no, because they had to wait for the interviews no, because they did not know the nature of the experiment before participating unable to determine whether subjects consented to experiment