The coordinates of the vertices of parallelogram abcd are a(-3,2) , b (-2,-1) , c ( 4,1) and d ( 3,4). the slopes of which line segments could be calculated to show that abcd is a rectangle? 1) ab and dc 2) ab and bc 3) ad and bc 4) ac and bd when you say what answer you chose can you explain why that’s the answer in depth?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

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?