Which expressions are equivalent to 30 - 3y - 9 3(17-y)
3(20-y-3)
17(3-y)
Or 20(3-3y)-9

Describe all the numbers that when rounded to the nearest thousand are 645,000

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

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?