Aa linear system is consistent if and only if the rightmost column of the augmented matrix ▼ is not is a pivot column. that is, if and only if an echelon form of the augmented matrix has ▼ of the form [0 0 b] with b nonzero.

Answer this 30 points and brainliest!

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.