Which of these is not random?

a. flipping a coin
b. choosing a card from a fair deck
c. scoring an a on a test
d. rolling a die

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.