given that (3,2,-6) and (-2,5,1) are solution of two equations in a system of three liberal equations which of the following is true about the system

Traffic on saturday, it took ms. torres 24 minutes to drive 20 miles from her home to her office. during friday's rush hour, it took 75 minutes to drive the same distance. a. what was ms. torres's average speed in miles per hour on saturday? b. what was her average speed in miles per hour on friday?

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4

Im so bad at fractions they are not my best math thing to work on