Use row reduction to solve the system of equations.
x-2y+z = 4
3x - 5y- 17z= 3
2x - 6y+43z = -5

Questions: -find the number of sandwich options using one bread, one meat, and one veggie. -find the number of sandwich options using one bread, two meats, and three veggies.(no repeats) -how many vegetarian options can be made? no meats, all the veggies, and one bread.

Match each polynomial with its factorization.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?